In the beauteous Kumaon division of Uttarakhand, there is an infamous cave temple called Gauri Udiyar.
Gauri Udiyar is a natural cave situated in Bageshwar district of Uttarakhand, which is about 8 km from Bageshwar town. Gauri Udiyar is one of the few holy temples, which is dedicated to Lord Shiva.
Inside this cave, there are many idols of Lord Shiva. Gauri Udiyar is quite famous in the Kumaon area. Gauri Udiyar is a spiritual and religious place.
In the Kumaoni dialect, ‘Udiyar’ stands for a small rock cave, where tigers and other wild animals live. The cave measures about 20×95 square metres and enshrines several images of Lord Shiva.
Source:
https://www.chardhamtours.in/uttarakhand/bageshwar/gauri-udiyar_271.html