These are in a park near me, but what is the top centre item?. See how the posts going into the ground are asymmetrical.

These are for adults, there is a childrens playground and this is part of a 'fitness trail'. The parallel bars in the lower left are spaced a normal distance apart, these sloped bars are thicker and closer together, so I can just manage dips on them.
Other equipment has signs saying what it is and how to use it but none on this piece.