This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
'Cathedral' in Waitomo Cave. The Cathedral in the Waitomo Glowworm Caves system looking back towards the main cave Stairs up can just be discerned in the distant background This was second exposure at ISO without flash Only limited amount of cave lighting was turned on due to flooding at the time Own Karora Waitomo Glowworm Caves