High Pasture Cave - Credit: Wikimedia Commons
High Pasture Cave (Gaelic: Uamh An Ard-Achaidh) is an archaeological site on the island of Skye, Scotland. Human presence is documented since the Mesolithic, and remains, including Iron Age structures, point to ritual veneration of either the landscape or deities associated with the place. The cave system extends to about of accessible passages Read more on Wikipedia
Source: en.wikipedia.org