Hiking in the Jungle and cliff jumping for sunset

As a lot of hiking trails are full of tourists we decided to do one of the less known hikes and hiked the 'Pu'u Ma'eli'eli Trail' to another old bunker on the east coast of O'ahu. IT was a nice trail through the Jungle and at the end had a nice viewpoint on the Kaneoche Bay and Mokapu half-island which hosts a Airforce base.

After returning from the Hike we drove to a Cliff jumping spot on the south end of the island to watch the sunset and of course jump off the cliffs. The waves were pretty strong that day, so getting out wasn't always easy but we managed and no one was left in the water haha.
I still don't know why the spot is called China Walls though