"Click to Enlarge" This, I believe, is the Oregon Coast's tourist lure, the Sea Lion Caves seen from above. It explains why the caves and its seals when seen from a protected platform in the cave (reached by elevator) do not require artificial lighting during the day. There is this large hole in the "roof." (My disclaimer is that I have never visited these caves. My father who generally loved the assigned attractions of vacations for some inscrubable reason thought this one not worthy of Dorpats on tour.)