We don’t know what purpose this semicircular building on the Inca Trail had.
There is also a single square building on the hill below it.
Some people think it was a temple, but it is really rough construction, so that is really unlikely.
But it is very carefully shaped and laid out, and the Incans didn’t usually make round buildings.
There is a really nice view from it, which would show the Dead Woman’s pass if it wasn’t so cloudy.
