Robber's Cave
Robber’s cave, locally known as Guchhupani located near Sahasradhara (thousand fold spring), is a river cave formation in Himalaya, located approximately 8 km from the centre of Dehradun city in Uttarakhand state of India. It was believed that robbers used to take shelter in Gucchupani after robbery, hence the British named it as robbers cave.
The cave is about 600 metres long, divided into two main parts. The cave has a highest fall of about 10 metres. In the central part there is a fort wall structure which is now broken. It consists of an extremely narrow gorge formed in a conglomerate limestone area on Doon Valley's Dehra plateau. It is a natural cave formation where rivers flow inside the cave.
Robber’s cave is known for unusual cold springs which goes underground at some of the places inside the caves. One can enter the cold water with folding pants and witness small and large waterfall.
Source:
https://www.euttaranchal.com/tourism/robbers-cave.php
https://en.wikipedia.org/wiki/Robber%27s_Cave,_India
http://www.transindiatravels.com/uttarakhand/dehradun/robbers-cave/