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:
Stvincentscave. St Vincent's Cave also known as Ghyston's Cave or Giant's Cave beneath the Observatory Bristol Transferred from org en transferred to Commons by User Mattbuck using de php CommonsHelper Taken by Rod Ward Original uploader was Rodw at org en en Rodw Personality rights heading SW original upload log