Add to Trip!

Hin Ta and Hin Yai are the highlights of some fascinating rock formations at the southern end of Lamai Beach on Koh Samui. They've been a source of giggles and wonder on the island since they were discovered by the locals many years ago. Known as Grandpa (Ta) and Grandma (Yai), the rocks look, respectively, like male and female genitalia.

Set on the rocky coastline between Lamai and Hua Thanon, Hin Ta and Hin Yai raise indulgent chuckles or embarrassed titters from those who go to see them. This unusual and titillating sight has, naturally, given rise to a legend explaining how the rocks came into being.