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:
HNVPThurstonLavaTube. Photo of entrance to Thurston Lava Tube Hawaii Volcanoes National Park Uploaded by photographer released to the public domain Own WTshared OldPine wts Other fields Information field ucfirst location Hawaii Volcanoes National Park User at old WTshared OldPine wts Original upload log wts page wts HNVPThurstonLavaTube