The Hill of Naked Men

Went to climb Little Blue Hill and I was wondering if I could see a view of downtown Boston from the top. As I got to the  summit, I was surprised to find it covered with naked men - not the view I wanted. Although I had a brief photo-blogger impulse to photo the exotic sights, I left the summit quickly. 
Before that, on the southwest foot of the hill:

I think it is a prayer seat because fireplaces are not usually built on a slope. 
Before I got to the summit, a shoulder: