Occurrence of Attributes in Original Text

The text related to the cultural heritage 'National Archeological Park of Tierradentro' has mentioned 'Mountain' in the following places:
Occurrence Sentence Text Source
The area holds the largest concentration of pre-Columbian monumental shaft tombs with side chambers--known as hypogeaxe2x80x94which were carved in the volcanic tuff below hilltops and mountain ridges.
The present state of archaeological and anthropological knowledge suggests that the builders of thexc2xa0hypogeaxc2xa0(underground tombs) lived in the mountain slopes and valleys in the area.