Located in the Garo Hills of the North East Indian state of Meghalaya, near Napak Lake and the Simsang River game reserve, it is a renowned limestone cave famous for its impressive stalagmite and stalactite formations.

Siju Dobakkol is home to tens of thousands of bats, and holds great significance in the field of biospeleology, being one of the most thoroughly researched caves in the Indian subcontinent.

Although known since ancient times, the scientific exploration of Siju Cave dates back to 1922, when it was investigated by Stanley Kemp and K. Chopra of the Indian Museum, Calcutta (now Kolkata), as part of an interdisciplinary research project.

[3] The Siju cave system is over 4.7 km (2.9 mi) long, although nearly all of it is filled with water and remains inaccessible to most visitors.

[citation needed] Siju Cave is known for its unique biodiversity, hosting a range of species, particularly from the Arachnida (spiders and their relatives) and Insecta classes.