Researchers believe that the entrance to the cave was a slit, which was then widened by humans. The entrance to the cave is 3 metres (9.8 ft) tall and 2.50 m (8.2 ft) wide and inside the cave there is a 1.3 m (4.3 ft)-tall altar which has been carved.
It’s a slit alright.
I knew someone else would show up and make the joke for me.
That would explain the shape
Well TIL. Thank you for sharing