Pocket Full of Pigeons

To begin, mount the slab and climb to the shelf to stare up at the gaping hueco above. Enter it as you go up and then escape it to find more giant buckets leading upward. Eventually they disappear to leave you groping and grasping little edges on the slab. Top out and take in the view. This one is quite the gem!

The jutting pillar with bathtub sized huecos and more huecos.

7 bolts, chains on top