Retrace your steps and make a right back on to Highway 56, and soon you'll see the first of two Kalihiwai Roads.  This was a loop road connected by a local bridge that was destroyed way back in 1957 by a tsunami.  Turn right on to the first Kalihiwai Road and then make another right once you see a dirt road,... follow the trail, park and hike the few minutes down to Secret Beach (Kauapea Beach).   This scenic beach was once Kauai's best known nude beach, although authorities insist nude bathing is illegal in the islands.