Situated on the banks of the Simsang river in South Garo Hills district of Meghalaya, Siju cave is recognised as the third longest cave in the Indian sub-continent. Known as Dobakhol or the cave of bats, Siju cave is located at a distance of 30kms from Baghmara and 132kms from Tura. The cave has a number of internal chambers and labyrinths which are yet to be explored.

For the first time, the cave was explored by the British Geologic Survey in the 1920s. Siju cave, with its striking stalagmites and stalactites, is home to more than ten thousands of bats. In the year 2007, a new kind of cave fish called SchisturaSijuensis (Menon) was discovered.

Siju Bird Sanctuary is situated close to Siju cave. Many rare and protected birds can be spotted in this Sanctuary. An impressive rock formation at the entrance of the bird Sanctuary is truly admirable. One can find a lot of trekking sites, river rafting and angling sites, community fishing and caving sites, in the vicinity of Siju.