Access to the cave is through a narrow opening and at the end of the cave is a huge stalagmite formation in the shape of Shivlinga.

They are at an altitude of about 800 to 1300 metres and are famous for million-year-old stalactite and stalagmite formations.

There are also coral caves within the reserve where stalactites and stalagmite formations can be seen.

The cave has about 14 stalactite and stalagmite formations up to 15 metres high, 85% of which are still growing.

Inside are passages of lit stalactite and stalagmite formations, and a 120-meter-long saltwater lake, which is at sea level.

The stalagmite formations present in most natural limestone caves resemble Shiva Linga (an Indian God), due to which most of the caves in India are considered of great religious import.

Approximately 90% of its stalactite and stalagmite formations are still active.

This stalagmite formation occurs only under certain pH conditions within the underground cavern.

Torches flickered in the high windows of houses carved from natural stalagmite formations.

Belum Caves is the second largest cave in Indian subcontinent and the longest caves in plains of Indian Subcontinent, known for its stalactite and stalagmite formations.