Lamai · Landmarks
Hin Ta and Hin Yai
Grandfather and Grandmother Rocks
Koh Samui's most famous natural landmark: two coastal granite rock formations shaped like male and female genitalia, tied to a local legend about an elderly couple lost at sea. Free to visit, at the south end of Lamai Beach, with a small souvenir and Kalamare candy market on the path in.
- Free
- Lamai
- Checked 25 Sept
Insider tips
- Wear sturdy footwear, rocks are slippery
- Bring water and sun protection, there is little shade
- Combine with nearby Lamai Beach or a south-coast trip
- Locals see the rocks as a fertility symbol, treat the site with respect
The story
Hin Ta (Grandfather Rock) and Hin Yai (Grandmother Rock) are natural granite formations on the rocky point at the southern end of Lamai Beach. Their shapes resemble male and female reproductive organs, which made them one of the most photographed spots in Thailand. A sign at the site tells the local legend: an elderly couple, Ta Kreng and Yai Riem, sailed to Prachuap Khiri Khan to ask for a bride for their son, drowned in a storm, and were turned into these rocks.
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Some locals treat the site as a fertility shrine. Hin Yai sits lower and is clearest at low tide. Entry is free; small parking fees (about 20 THB scooter, 50 THB car) are charged by local landowners, and a nearby rock viewpoint charges about 20 THB.
A short market walkway sells souvenirs and Kalamare, Samui's traditional coconut caramel candy. A typical visit takes 30-45 minutes. The rocks are slippery and there is almost no shade, so morning or late afternoon visits are more comfortable.
Swimming off the rocks is not advised due to slippery surfaces and wave surge; South Lamai's sandy beach is a short walk away.
Good to know
- Open daily during daylight hours (roughly 06:00–18:30).
- Free
- Early morning or late afternoon for softer light, fewer people and less heat
- Family friendly: Yes
Plan a visit
Free route: you go by your own scooter, car or on foot and we work out the order. Private tour: a local driver picks you up and takes you.
Checked 25 Sept 2026 · 5 sources
Sources and last check
- Last checked
- 25 Sept 2026
- What was checked
- Details checked 25 Sept 2026
- Next check due
- September 2027
Official sources
No official source published yet for this page.
Plus 5 other references and local research.
