Hin Ta Hin Yai

Perched on the southern end of Lamai Beach, Hin Ta Hin Yai — meaning Grandfather and Grandmother Rocks — are a pair of naturally sculpted coastal rock formations that have become one of Koh Samui's most recognisable landmarks. The rocks are celebrated for their unmistakable resemblance to male and female genitalia, a geological curiosity that draws curious visitors and makes for memorable, light-hearted photo opportunities. Beyond the novelty, the surrounding coastal scenery is genuinely attractive, with rugged shoreline, crashing waves, and open sea views that reward those who take a moment to look past the crowds. The site is compact and easy to explore on foot, with visitors free to wander around the formations, find their angles, and take in the natural setting at their own pace. The atmosphere is relaxed and informal, though the area can become busy during peak hours. Sunset is a particularly appealing time to visit, when the sky shifts colour above the water and the sound of the waves adds to the experience. November and the wetter months bring higher waves, which some visitors find adds drama to the scenery. Entry is free, making this a low-commitment addition to any Koh Samui itinerary. Taxis drop off directly at the site, and for those arriving by car, parking is available for 30 baht. The site is open daily from approximately 8:30am, with slightly extended hours on Saturdays. A brief stop of 20 to 30 minutes is generally sufficient to see the rocks and explore the immediate area.