Wailua Falls, Double waterfall in Kauai, United States

Wailua Falls is a waterfall on the South Fork Wailua River near Lihue on Kauai, Hawaii, dropping 173 feet (52.7 m) over a dark rock ledge. The water breaks into several thick vertical streams that join into one broad curtain, with moss and small plants on the cliff edge above and an uprooted tree trunk lying near the top to the left.

In ancient times Hawaiian men jumped from the top of the falls to prove their manhood, a leap that is now dangerous and illegal; in 2016 a jumper was knocked unconscious and rescued by a swimmer. The falls later appeared in the opening credits of the television series Fantasy Island.

The name Wailua comes from Hawaiian and means "two waters", referring to the two streams that fall over the cliff. In ancient times Hawaiian men jumped from the top of the falls to prove their manhood; the practice is now dangerous and illegal, though some still attempt it. In 2016 a man who jumped was knocked unconscious and was saved by someone who swam out into the pool.

A paved viewing platform sits directly at the parking area along Maalo Road, a few miles north of Lihue town, and offers a frontal view of both cascades. Those who want to take the steep, unmarked trail down to the base should expect slippery roots and wet ground.

The falls appear in the opening credits of the television series Fantasy Island. In 2016 a man who jumped from the top was knocked unconscious and nearly drowned before someone swam out into the pool and pulled him to safety; jumping remains dangerous and illegal.