Walk right from Spitting Caves(Hawaii4 on AAW) about 1/2mile and get to China Walls. You can also get there by road off of Hanapepe Loop. The cliffs are jumpable just about anywhere. The hardest part is getting out. Wait for a small wave to give you enough time to pull onto a flat rock and scurry out before a big one washes you back into the water.
Hanapepe Pl, Honolulu, HI 96825, USA