Also known as the China Wall, the Spitting Caves are found on the island of O’ahu. The caves have long been a popular destination among tourists. Water that rushes into the cave is often spat back out, sometimes with a force so strong, water can cascade out some 20 feet. Often, a rainbow appears at the end of the water trail. A makeshift memorial is also located near the caves honoring cliff jumpers who have died at the site.