South of Lamai Beach, a short scooter ride past the fruit stalls and coconut ice cream carts of Hua Thanon, sit two of the most photographed natural landmarks on the island: the grandfather and grandmother rocks of Koh Samui, known locally as Hin Ta and Hin Yai. They cost nothing to see, take under an hour to visit properly, and come with a folk legend that most songthaew drivers on this stretch of coast can recite from memory. If a Silver Beach afternoon is already on your plan, this is the easiest add-on stop on the whole southeast coast.

What Are the Grandfather and Grandmother Rocks on Koh Samui?

Hin Ta and Hin Yai are two granite boulder formations sitting right at the shoreline at the southern end of Lamai Beach, in the Hua Thanon area. "Ta" means grandfather, "Yai" means grandmother, and the names come from the rocks' shapes, which locals long ago decided resembled male and female anatomy. It sounds like a gimmick until you're standing in front of them, at which point the resemblance is obvious enough that you understand why the spot draws a steady trickle of visitors every day rather than a one-off curiosity crowd.

Thai folk culture treats fertility symbolism as ordinary rather than risqué, and this is one of the more famous examples on Samui. Couples trying to conceive still visit and leave small offerings nearby. Whether or not you buy into that side of it, the rocks are a genuinely striking piece of coastal geology, shaped by decades of wind and wave the same way the granite boulders bookending Silver Beach were formed a few kilometres up the coast.

The Legend Behind the Rocks

The story, as it's told around Lamai and Hua Thanon, goes back to an elderly couple from Nakhon Si Thammarat on the Thai mainland. Their son had reached marrying age, and the two set sail to a neighbouring province to arrange his marriage to a local official's daughter. A storm caught their boat off this coastline, and the couple drowned. Locals say their bodies washed ashore and turned to stone as proof of how far they'd travelled and how much they wanted the match to succeed, so that the bride's father would know the family's intentions were genuine.

It's a tragic story wrapped around what is otherwise a lighthearted, slightly cheeky roadside attraction, and that contrast is part of why it has stuck around as one of Samui's better-known bits of folklore. Nobody claims it's historically verified. It's a legend, told the way legends are told, and it's worth hearing before you look at the rocks rather than after.

Getting There

Hin Ta and Hin Yai sit right on the main road at the southern edge of Lamai Beach, close to Hua Thanon fishing village, which makes them easy to reach from almost anywhere on the east coast:

  • From Lamai centre: a few minutes by scooter or taxi along the coast road heading south.
  • From Chaweng: roughly 20 to 30 minutes by taxi or songthaew, depending on traffic through Lamai.
  • From Silver Beach: about ten minutes further south, making the two spots an easy pairing for one outing. Our guide to getting to Silver Beach covers the same stretch of road in more detail if you're routing a full day.

A rental scooter gives you the most flexibility, since the rocks are a quick stop rather than a destination that needs half a day. If you're relying on taxis, agree the fare before you get in, and remember that Grab cannot pick up passengers inside Koh Samui airport, so plan your first leg of the day around a taxi rank or hotel pickup instead.

What to Expect When You Visit

There's no entry fee. Parking is a small charge, roughly in the 10 to 30 baht range depending on where you leave your scooter or car, which is about as much friction as the visit involves. The rocks themselves are a two-minute walk from the road, down a short path lined with souvenir stalls, dried fruit vendors and the inevitable coconut ice cream sellers. It's touristy in the way any famous roadside stop is touristy, but it doesn't feel like a hard sell, and most visitors are in and out within 30 to 45 minutes.

Go earlier in the day if you want fewer people in your photos and less midday heat on the exposed rock platform. There's minimal shade down at the shoreline, so bring water and sun protection if you're stopping around midday. The path is uneven in places, with some scrambling over rock to get close, so flip-flops are fine but flimsy sandals are not ideal.

Pairing It With a Silver Beach Afternoon

Because the rocks only need 30 to 45 minutes, they work best folded into a bigger day rather than treated as a standalone trip. The obvious pairing is Silver Beach, ten minutes north, which has the calm water, snorkelling and quieter sand that a quick roadside stop doesn't. Our complete guide to Silver Beach covers the swimming, snorkelling and layout of the cove if you haven't been before, and if you're timing the day around golden hour, our piece on sunset at Silver Beach explains why that's better done from a different spot on the island, since this east-facing cove is built for sunrise rather than sunset.

A sensible order for the day: rocks first thing or mid-morning, Silver Beach for a swim and lunch, then finish at Crystal Bay Beach Club on the sand for the evening, where the kitchen runs until 21:30 and the fire show lights up the beach every Tuesday and Friday night. You can check what's on the Beach Club menu before you go, whether you're after fresh seafood, a wood-fired pizza, or the signature pina colada served in a young coconut.

None of this needs booking in advance, which is exactly the point. Hin Ta and Hin Yai are a five-minute curiosity with a good story attached, not a headline attraction, and that's precisely why they're worth the short detour on your way to or from the beach.