Hin Ta Hin Yai, Koh Samui: The Rocks Everyone Photographs and Nobody Explains
A local's honest guide to Hin Ta Hin Yai Koh Samui, the Grandfather and Grandmother rocks. The legend, when to go, what it costs, and whether it's worth the stop.
May · July 17, 2026

Every list of things to do on the island sends you to Hin Ta Hin Yai in Koh Samui, and almost none of them tell you the honest thing about it: you are driving to the south end of Lamai to look at two rocks that look like a very specific pair of body parts. That's the whole attraction. Grandmother and Grandfather. We live one headland north in Chaweng Noi, we've taken every visitor here, and we're going to save you the polite tiptoeing the guidebooks do.
The good news is it's genuinely worth twenty minutes. The other good news is it's free. Let's get you there without the tour-bus nonsense.
What Hin Ta Hin Yai actually is
Two granite formations on the rocky coast at the southern end of Lamai Beach, carved by the sea and the weather over a very long time into shapes that are, let's say, anatomically committed. Hin Ta is the grandfather. Hin Yai is the grandmother. You will understand which is which within about four seconds of arriving, and so will your mother, so don't overthink how to bring it up in the group chat.
The rocks sit off Route 4169, the coast road that loops the island, roughly two kilometres from the main stretch of Lamai Beach. There's a big sign over the entrance road. You can't miss it, mostly because there's a car park and a row of stalls and everyone else on the island is already there.
The legend, which is sadder than the rocks let on
Here's the part the photos skip. The story goes that an elderly couple, Ta Kreng and Yai Riem, sailed over from Nakhon Si Thammarat on the mainland to arrange a marriage for their son. A storm caught their boat, both of them drowned, and they turned to stone here on the shore so the family they never reached would know what happened.
So the joke rocks are actually a shipwrecked grandma and grandpa who died trying to sort out their kid's wedding. Thailand does this a lot: hand you something that looks like a gift-shop punchline and put a small tragedy inside it. Now you know, and now the selfie feels slightly different.
Getting to Hin Ta Hin Yai from Chaweng Noi
It's the next stretch of coast south of us. From Chaweng Noi you drop over the headland, follow Route 4169 down past Lamai, and the turn-off is signed on your left where the road meets the sea. On a scooter it's a short, pretty run down the east coast. In a taxi or songthaew, agree the price before you get in, the way you should for every ride on this island. If you've based yourself down in Lamai, it's practically on your doorstep.
There's no entrance fee. Parking is a few baht for a scooter, a little more for a car, handed to whoever is sitting by the barrier. That's the entire cost of the outing, unless the coconut ice cream gets you, which it will.
What's actually at the site
From the car park you walk down a short, narrow strip lined with small shops before you reach the rocks. This is not a hardship. It's coconut ice cream, fresh cut fruit, cold drinks, a few little bars and restaurants, and stalls of handmade souvenirs made from old coconut shells and seashells. You can, if you insist, buy a miniature Grandfather Rock to take home. They come in several sizes. Make of that what you will.
At the end of the walk the coast opens up: granite boulders, turquoise Gulf water knocking against them, and the two famous formations doing their thing. There are toilets on site. Behind them, a small staircase climbs to a viewpoint over the coastline, which is the bit most day-trippers miss because they're busy queuing for the one obvious photo.
When to go (and why we always say early)
Go early. First thing, when it opens around six in the morning, is the answer to almost every question you have about this place.
The coast here faces east and southeast, so the morning light lands soft and golden right on the rocks. That's the same reason we're always banging on about the sunrise on this side of the island rather than chasing a sunset that happens on the far west coast. Early is also when the car park is empty, the stalls are quiet, and you can actually stand in front of the rocks without a coach group photobombing you. By midday in high season it's shoulder to shoulder and the light's gone flat.
If mornings aren't your religion, late afternoon is the second-best window. Just not the middle of the day.
Is Hin Ta Hin Yai Koh Samui worth it? The honest local take
For a free stop that takes twenty minutes and comes with a legend, coconut ice cream, and a sea view? Yes. It is not a half-day. Do not let a tour operator sell it to you as a half-day. It's a quick, funny, slightly moving pull-over that pairs perfectly with a lazy morning on Lamai, one of the better beaches on this stretch of coast, and it slots neatly into a wider run of things to do on Koh Samui for couples who want the island's odd corners, not just the beach club.
Come for the joke everyone came for. Stay the extra two minutes for the viewpoint and the story. Then drive back up the coast for a proper breakfast.
Quick answers
What does Hin Ta Hin Yai mean? Hin Ta means Grandfather Rock and Hin Yai means Grandmother Rock. The names come from the shapes the two granite formations have eroded into, which resemble male and female anatomy.
What's the story behind the rocks? Local legend says an elderly couple, Ta Kreng and Yai Riem, drowned in a storm while sailing from the mainland to arrange their son's marriage, and were turned to stone on this shore. The playful shapes, the sad story underneath.
How much does it cost to visit? Entry is free. You only pay a small parking fee, a few baht for a scooter and a bit more for a car.
What's the best time of day to visit Hin Ta Hin Yai? Early morning, not long after it opens around 6am. The east-facing coast gets soft golden light on the rocks and the crowds haven't arrived. Midday in high season is hot, flat and packed.
Where is it? At the southern end of Lamai Beach, off Route 4169 on the southeast coast, roughly two kilometres from the main beach. It's signposted, with a car park and a strip of shops leading down to the rocks.

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