About: http://webisa.webdatacommons.org/420558516

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Left is the opening on the surface and to the right is a photo taken inside looking up. the entrance is at water level.
http://www.w3.org/ns/prov#wasQuotedFrom	tarleton.edu