It is located on a natural hill that needed to be conditioned with a giant platform for its construction. It is composed of four staggered superimposed bodies, it has an approximate height of 13 m and in the west facade it presents a stairway without alfardas that leads to the superior part, where a templete is conserved. About its architectural style, it can be said that it has influences of the Petén.

In each of the bodies contiguous to the stairway there are masks, six in total. These are sculptures in high relief of modeled stucco, covered by a red pigment. Their main motif is a monumental mask represented from the front, which occupies the center of a rectangular area in which the attributes of the personage are distributed. The faces seem to correspond to historical personages invested with solar attributes. They present Olmec features such as the moustaches and nose rings; the enormous eyes are associated with Kinich Ahaw, the lord solar face; the headdress is different in each mask, while the pectoral probably represents a jaguar that refers to the nocturnal sun in its journey through the underworld. On the sides stand out the earflaps completed with celestial serpents; and on the upper left side there is a representation of a shark or xoc, which could refer to the name of the ruling house of Kohunlich.

The Temple also has a tomb that was looted before the beginning of the explorations. Only teeth, jade fragments, a stingray spine and ceramic fragments belonging to the Early Classic were found in it.

Mask 2 North

Mask 2 South

Mask 3 North

Mask 3 South

Mask 4 South

This group of structures was called "Acropolis" by the archaeologist Raymond Merwin at the beginning of the 20th century, however, it does not correspond to the type of building to which this name is given within the Mayan architecture; in reality it is the product of a long constructive activity that generated one of the most complex architectural groups of the site.

Its constructive history began in the Late Classic period, currently it can be seen as a large foundation on which a series of smaller buildings are erected and to which others of similar size are attached. Below the covering, fragments of an ancient building can be seen, of which today some details can be observed in the south and east portions.

Elevated Patio: Their structures correspond to the last constructive stage of the Acropolis, possibly they were erected between the years 750 and 850, perhaps at the same time that some buildings of the Residential Group West, of the Square Merwin and of the group denominated The 27 steps were constructed. Evidently they had a residential function, although it is possible that some buildings may also have had ceremonial or administrative purposes. Due to the access restrictions and the location of the buildings themselves, it is certain that the entire complex was reserved for the elite.

Sur Group: Given its physical location and architectural characteristics, the central building of the Conjunto Sur seems to have been the most important one in the elevated patio. It consists of two rooms; one of them has an elegant central banquette ornamented with five niches that cover the entire interior of the room. This construction is one of the best examples of the so-called modified Rio Bec style: its façade shows a lower molding of 15 cm; also the corners, the jambs and the sides are ornamented with columns embedded in the wall, which makes the building the most elegant of the whole. In him remains of ceramics dated in the Late Classic, shells and bones were found.

East Group: It consists of three buildings; the central one has a single room equipped with two benches, located at the north and south ends, as well as a small niche in the north wall. It is very similar to the rooms of the South Complex, since its jambs and corners are ornamented with embedded columns.

Southwest Annex "Los Grafitti": In the southwest corner of the Acropolis is located a series of housing structures attached to the walls of a Great Basement and functionally integrated to the Acropolis Plaza and Group B-5 or Western Residential Complex. The complex seems to have been built at the beginning of the Late Classic period (600-700) and throughout its occupational history it suffered several modifications. It is a 2.05 m high platform, on which was originally built a single bay building with access from the north through 3 openings. The stairway that leads to the rooms consists of five steps covered by quadrangular slabs. In one of its rooms it was observed that the covering of the walls had diverse prehistoric grafitti among which animals, anthropomorphic beings and geometric motives could be observed.

It served as the site's center of gravity during the Late Classic period. Some of its buildings present the Pix'an architectural style, typical of Kohunlich (smooth walls of stone placed “a hueso” -that is, without mortar-, moldings that frame groups of small columns, rounded jambs in the main entrance, embedded columns and niches in the facades). It is a space of exclusive use for members of the elite that has structures such as La Gradería, associated with the celebration of various ceremonies.

El Rey (Structure B-2): It is located at the west end of the Plaza de las Estelas. Fragments of Late and Terminal Classic ceramics were found here, as well as carved and polished lithics. The distribution, constructive quality and style of this small construction are identical to those of the buildings of the West Residential Complex that were built between 600-800 within the modified Río Bec style.

The Graderia (Structure B-3): Located at the southern end of the Plaza of the Stelae, Structure B-3 is a group of at least five buildings, oriented on an east-west axis, built on a common platform, which was extended to the east and south to allow for the construction of new buildings, the last of which seems to have been built as part of the Plaza Mewin.

In this structure a burial-offering was located. It is a human leg associated with some animal bones and some bone fragments corresponding to an infant. The ceramics found in this context allow us to date the offering to the middle of the Late Classic (ca. 700).

Palace of the Stelae (Structure B-4): It closes the east side of the Plaza of the Stelae. It is a group of at least four buildings arranged on a common platform, extended on several occasions. The different constructive stages that can be registered in this group seem to testify a long occupational history, during which several constructive projects were developed. In the central room of the main building was located the burial of an adult that contained a complete vessel corresponding to the Terminal Classic (ca. 900).

This housing complex is located in the western portion of the Acropolis Plaza. To the west it is delimited by a natural drainage, to the north by the annex building of the North Palace (Structure B-6) and to the south by the current access road to the site. It occupies an area of approximately 70m on a north-south axis, and 30m on an east-west axis. During the excavations, ceramic and lithic material, shell and small anthropomorphic figurines, whistles and human bones were found. Stucco floors were also found in an excellent state of preservation, some still with red pigment.

All the structures that integrate it are of masonry and are covered with Mayan “vault”; most of them are arranged around a patio located at the foot of the stairway that leads to the rooms of the superior part of the Acropolis. The west side of the patio is occupied by several relatively modest structures. Each of them is associated with some open space in which a good part of the daily activity would have taken place; remains of external stairways suggest that these activities also took place on the roofs. Almost all of these structures are arranged in small groups, each of which could be a family residence.

It is located to the north of the plaza of the Conjunto Residencial Poniente. Together with the Acropolis, it seems to have formed the residential area of the elite. It has two very late attached rooms, probably from the Early Postclassic period that lack the architectural quality of the rest of the building. In the northeast corner was found another attached structure that probably served to house people linked to the elite who lived in the palace during the population climax.

It is a good example of Kohunlich's own architectural style, which combines elements of the Río Bec region and local features. The facade of ashlars, very well faced, without apparent joint, is very similar to those that can be observed in sites like Becán, Chicaná or Xpuhil. The building also has benches with niches and curtains. It is the product of at least two construction stages, it is oriented to the south, has two bays and three rooms. Inside the bays there are three sidewalks, two of which occupy the central area of the building. Additionally, the complex includes five niches. The two main benches are the best indicator that the building was a palace structure, while the niches seem to have been used to store offerings or objects associated with daily worship.

The occupational history of the building seems to have occurred within a 500-year period, ranging from 700 to 1200.

The material recovered during the excavations indicates that all the structures around the plaza are Late-Terminal Classic. A platform was built in the center of the plaza, from which a late offering of several ceramic plates was recovered.

Building of the Eleven Doors (Structure D-2): Located at the south end of the plaza, it is the structure of greater proportions within the complex. It is formed by a long and narrow gallery that can be accessed through eleven openings. The building is built on a low platform that is ascended by a six-step staircase. It was occupied during most of the Late Classic and Terminal Classic periods. It was possibly related to administrative activities, since the gallery is very narrow and is not equipped with benches or niches. The elegant proportions of this building, which has also been given the name of House of the Eleven Doors, allow it to be associated with the modified Rio Bec architectural variant. The ashlars placed in horizontal and continuous courses are of regular quality. The design of the elegant elongated bay provides harmony to the whole complex, which stands out for the amplitude of its spaces and the respect for the original established layout.

Structure D-4: This important building is located at the east end of the Merwin Plaza. It is a platform with a height of 2 m on which stands a building with a single bay and seven openings, as well as a small annex room located at the south end of the basement. Numerous fragments of modeled stucco were found at the foot of the façade, which allows us to affirm that at least the upper face was decorated, possibly with masks. In addition, large quantities of ceramics, lithics and shells corresponding to the Late Classic and Terminal periods were found.

Building of the Paired Columns: It is located on the west side of the Plaza; it has a single gallery and a portico with three pairs of free columns, and two more pairs of columns embedded in the wall of the main facade.

It is a housing complex integrated by a group of structures arranged around two courtyards, presided by a palace-type building and two additional sets in peripheral position. Its construction dates from the Late-Terminal Classic.  Practically all the rooms of these structures are of masonry and had Mayan vaults, of which remains are still preserved. It was built on a hill that was modified by means of retaining walls and fillings, which could suggest certain political, economic independence or both, of the group that resided in it. On the south side of the first courtyard, which is accessed by the staircase that gives its name to the complex, there is a palace-like structure consisting of a series of rooms on a relatively high platform.

It is a housing complex located on a hill; apparently it was the place of residence of a distinctive group. It is integrated by a total of eleven structures, one of them palace type. Unlike the Noroeste and Los 27 Escalones complexes, its structures are not arranged around a patio. Possibly the first architectural project can be dated in the Early Classic, however its constructive climax was during the Late Classic and its maximum demographic expansion was reached in the Terminal Classic.

Pixa'an Palace (E-1): It is a structure with a C-shaped floor plan and main façade facing south. All the spaces were covered by vaults and, probably, on the central wall a cresting was erected. The basic elements of its architecture are: the rounded jambs framing the main access, friezes with geometric designs, external cladding of cut stone and covered with a thin layer of stucco, internal benches and walls with niches. It is a sort of replica of the temple of the structure known as El Rey, located in the Acropolis. The elements recovered from the collapse of the south façade allow us to know that it had a frieze decorated with stars.

Structure E-7: It has a rectangular plan, three access openings, a vaulted bay and a sidewalk. The two accesses on the west side lead to a patio in which a room and a sidewalk were built late. In this structure a metate with the hieroglyphic inscription 3 Ahau was recovered.

Structure E-8: Two-story building oriented to the west. The lower level has two vaulted rooms separated by the main stairway, while the upper level has three rooms.

Ceremonial complex located 700 m northeast of the Plaza de las Estelas. It is surrounded by several large buildings; those located in the northeast corner were known under the name of "Los Tres Hernamos", however, there are at least nine buildings. This is the oldest complex found so far in Kohunlich, so it was given the name Ya'axná, which means "the first house" or "the oldest house".

Structure E-1: Pyramidal base located to the north of the plaza and oriented to the south. It has an elliptical platform, four bodies and is topped by a temple. The general design suggests a close relationship with the Guatemalan Petén and the north of Belize; the first constructive stage of the building is from the Preclassic and the one corresponding to the exposed building is from the Early Classic.

Structure E-2: It is located in the northeast corner of the plaza and is oriented to the west. It has a long constructive sequence that goes from the Early Classic to the Late Classic. It has 3 bodies of vertical walls that could have had a molding as a finial. The basement was used as a support for a burial that was looted, leaving only a human tooth and remains of polychrome ceramics. Another burial of an earlier stage was found in which there were remains of an infant and an adult. In the fill of the antepenultimate construction period, an offering of several dozens of red ceramic plates and bowls was found, tentatively dated to the Middle Classic.

Structure E-3: Located towards the southeast corner of the plaza and dated to the Early Classic. Its architectural style corresponds to the modified Petén; its design and finishes are significantly more elaborate and careful than those of E-1. It has a temple with two rooms of which only some walls are still standing.