Koh Samui’s naughty grandfather and grandmother rocks

Koh Samui’s grandmother and grandfather rocks are among the strangest tourist attractions in the world. These two rock formations in Thailand look respectively like male and female genitalia.

I kid you not. Just take a look at these photographs and tell me what you see…

The infamous grandfather rock in Koh Samui, ThailandThe infamous grandmother rock in Koh Samui, Thailand

These rocky outcrops are found at the southern end of Lamai Beach, Koh Samui’s second-largest resort area after Chaweng, and they’re fairly popular with camera-wielding tourists and people with dirty minds.

Many island tours will stop here, which is how I found myself photographing a giant rock, ah, dong a few years back. (That’s one sentence I never thought I’d ever write.) Naturally, this being Thailand, there is a trail of souvenir stalls on the way to the grandmother and grandfather rocks.

Known locally as Hin Yai and Hin Ta, according to local legend the rocks are all that remains of an old couple who washed ashore in a storm. Hence why we call them the grandmother and grandfather rocks. I think they’d be slightly less creepy if they weren’t purported to be the genitalia of old people.

I wouldn’t say the grandmother and grandfather rocks are one of the best things to see in Koh Samui but they are good for a laugh – and you must admit they mark an uncanny resemblance to men’s and women’s naughty parts.

While you’re here, check out my photographs of Krabi’s giant crabs and of a marvelous food boat on Railay Beach.

About Simon Petersen 504 Articles
Travel blogger, journalist, sports and movie fiend. Chronicling the life and times of a Kiwi at home and abroad.


  1. I spent 2 weeks at Koh Samui and am only hearing about these today – on your blog! Thanks Simon, wonder what else I missed!

    • I kind of know what you mean because while I saw these rocks a couple of years ago on a tour of Koh Samui, when I was back there last year I never realised that they were just up the road from where I was staying! Hope you had a great trip.

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