The area is very well known for its pre-Colombian hypogea, which were found in several excavations, and are divided in many archeological places. some of them are: Alto del Aguacate (Avocado Hill), Alto de San Andrés, Alto de Segovia, Alto del Duende and El Tablón.
The typical hypogeum has an entry oriented towards the west, a spiral staircase and a main chamber, usually 5 to 8 meters below the surface, with several lesser chambers around, each one containing a corpse. The walls are painted with geometric, anthropomorphic and zoomorphic patterns in red, black and white. Some statues and remains of pottery and fabrics can be seen scarcely due to grave robbery before the hypogea were constituted as protected areas.
The precolombian culture that created this funeral complex inhabited this area during the first millennium A.C. Tierradentro Archaeological park features hypogea dating from 6th to 9th centuries AD. The details in the sculptures and pictoric patterns are similar to the San Agustín culture.
The park generates significant revenue to the local economy due to the high volume of tourists, both Colombian and foreigners. These sites form a UNESCO World Heritage Site.