At a distance of 1.5 km from Gangotri, Pandava Gufa is an ancient natural cave situated on the Uttarkashi-Gangotri road. It is said to be site where the five Pandavas during the period of Mahabharata mediated while they were going to Kailash.

Source:

https://www.trawell.in/uttarakhand/gangotri/pandava-gufa-pandava-cave