There is a limestone mountain in the southern part of Mount Bagabogd. At the foot of the mountain there is an entrance facing west, 3.5 meters wide and 3.2 meters high, which was excavated six times between 1987 and 2000. The relics were found to be from 750,000 years ago,  horizontal cavern defined as an ancient relic. The roof of the cave is spherical and the floor is flat. The walls and roof are covered with large fluffy yellow fluorite crystals. The cave has a total length of 44.1 meters, an average height of 4.5 meters and an average width of 4.4 meters. There are four large halls connected to each other by narrow tunnels, and the third has a rather large chimney.