Hin Ta Hin Yai: Koh Samui's Grandfather and Grandmother Rocks

Overview

Hin Ta Hin Yai (the Grandfather and Grandmother Rocks) are two wind-carved granite boulders on the shoreline at the southern end of Lamai Beach, on Koh Samui’s southeast coast. Entry is free, there is no gate, and most people spend 15-30 minutes here. The rocks are named for their shapes, which resemble male and female anatomy, and tied to a folk legend about an elderly couple who drowned at sea.

Key takeaways

• Free public rock formation on the shore at south Lamai, no gate; sources quote daylight hours of roughly 8:00-19:00.
• Two named granite rocks: Hin Ta (Grandfather) and Hin Yai (Grandmother), tied to a local folk legend.
• Reached via a short path lined with souvenir stalls off Route 4169; motorbike parking runs about 20 THB (one source says cars pay about 50 THB).
• About 0.95 km from Wat Sila Ngu and roughly 25-35 minutes by taxi from Samui Airport or Chaweng.

Key Facts

Hin Ta Hin Yai sits on public shoreline, not inside a ticketed venue, so there is no gate, phone line, or official booking site: only the rocks, a stretch of granite outcrop, and a row of souvenir stalls along the access path.

No single operator runs the site, so this page does not list a phone number or official website. Treat the third-party listings below and the map link as the working references instead.

The Legend of Hin Ta and Hin Yai

What does Hin Ta Hin Yai mean?

In Thai, hin means rock, ta is grandfather and yai is grandmother, so the name reads “Grandfather Rock, Grandmother Rock”. Hin Ta is the upright pillar; Hin Yai is the lower, cleft boulder.

The story behind the rocks

The rocks are named for an elderly couple from Nakhon Si Thammarat on the Thai mainland who, in local legend, sailed out to arrange their son’s marriage and never completed the journey. Different tellings vary the details, but the outline is consistent across sources: the couple’s boat was struck by a storm, they were swept overboard, and their bodies are said to have washed ashore at Lamai and turned to stone, the slender Hin Ta and the rounder, cleft Hin Yai.

The story has stuck because the rocks’ shapes genuinely resemble male and female anatomy, which locals read as a symbol of fertility. Thai and international visitors alike stop to take a photo beside them, and the site draws hundreds of visitors a day according to Thailand dive and travel guide Snorkeling Thailand, making it one of the most-visited free stops on the island’s south coast.

What You’ll See

Hin Ta stands apart from the main boulder pile as a single upright pillar of granite, weathered smooth by decades of wind and salt spray, with the sea and Lamai’s coastline behind it. Hin Yai sits lower, folded into the surrounding rock, its split shape less immediately obvious than Hin Ta’s but still the more talked-about of the pair locally. Around both, the wider outcrop is a genuine boulder field worth a slow walk: smooth granite slabs, tidepools, and a narrow channel worn into the rock by centuries of wave action.

The site is unshaded and the granite gets slippery near the waterline, so footwear with grip matters more than it looks like it would from photos. There is no barrier or ranger on site; visitors climb over the rocks freely, which is part of the appeal and part of the risk.

Prices and Access

Hin Ta Hin Yai itself is free to view. Every source checked for this page agrees on that point, and there are no tickets to buy. The only cost is incidental: parking paid to local landowners (about 20 THB for a motorbike; one source gives about 50 THB for a car), and the souvenir stalls along the access path sell drinks, snacks, and rock-shaped trinkets at typical tourist-strip prices.

Getting There

Hin Ta Hin Yai sits just off Route 4169 at the southern tip of Lamai Beach, reached on foot down a short, shop-lined path from the main road. From Samui Airport or Chaweng, the drive to Lamai runs roughly 25-35 minutes by taxi or shared van, the same range this site’s Lamai beach guide gives for the wider area. Anyone already staying in Lamai can walk or scooter to the rocks in a few minutes; parking directly at the site is tight, so a taxi or a short walk from a central Lamai hotel is usually easier than driving in.

When to Go and How Long to Stay

Allow 15-30 minutes for the rocks themselves, longer if you walk the boulder field or add the beach. The site gets busy with tour groups by mid-morning, so arrive early if you want photos without a crowd. There is no shade and the granite is slippery near the water, so wear shoes with grip. Late afternoon also works for softer light, but the site has no lighting after dark.

Nearby

The closest named landmark is Wat Sila Ngu, the island’s striking red temple, about 0.95 km away by road. Baobab, a café near the access path, sits roughly 0.75 km off. Lamai Beach itself, Koh Samui’s second-largest beach, with its Sunday night market and Muay Thai camps, stretches north from the rocks, and the Lamai area guide covers the wider neighborhood’s hotels, restaurants, and nightlife for anyone building a longer stop around the visit.

Pros and Cons

Hin Ta Hin Yai’s biggest strength is that it costs nothing and takes only a few minutes to see, which makes it an easy add-on to any trip along Lamai or the south coast. The rocks are genuinely striking, well signposted, and close enough to Wat Sila Ngu to pair into one short outing. Set against that: the site gets busy with tour groups by mid-morning, there is no shade, the granite is slippery near the water, and the souvenir stalls along the path can feel like a pressure-sell for anyone not expecting them. Car parking is limited enough that arriving by taxi or scooter is usually the smoother option.

FAQ

What are Hin Ta and Hin Yai?

Hin Ta and Hin Yai are two granite rock formations on the shoreline at south Lamai Beach, Koh Samui, named the Grandfather and Grandmother Rocks for their shapes and tied to a local legend about an elderly couple who drowned at sea and turned to stone.

Is there an entrance fee for Hin Ta Hin Yai?

No: Hin Ta Hin Yai is free to visit. The only likely cost is roadside motorbike parking, at roughly 20 THB, since the site has no gate, ticket booth, or official operator.

What are the opening hours?

Hin Ta Hin Yai has no formal opening hours or gate; it is a public shoreline site. Third-party guides quote roughly 8:00 to 19:00 (some 8:30 to 18:30), with no lighting or facilities after dark, so go in daylight.

How do I get to Hin Ta Hin Yai from the airport or Chaweng?

Hin Ta Hin Yai sits at the southern end of Lamai Beach off Route 4169, about 25-35 minutes by taxi or shared van from Samui Airport or Chaweng: the same drive time this site’s Lamai beach guide quotes for the wider Lamai area.

Is Hin Ta Hin Yai a nudist beach?

No. Hin Ta Hin Yai is a public rock site with stalls and tour groups, and Thailand has no official nudist beaches: public nudity is illegal and can be fined. The “anatomy” shapes are in the rocks, not the visitors.

Are there tickets or reviews to check?

There are no tickets: the rocks are free, and reseller listings only sell tours that include a stop. Visitor reviews generally call it a quick, amusing photo stop rather than a destination, which matches the 15-30 minutes most people spend here.

Is Hin Ta Hin Yai worth visiting?

For most visitors, yes: it costs nothing, takes 15-30 minutes, and pairs easily with a stop at nearby Wat Sila Ngu or a walk along Lamai Beach. Visitors specifically hoping for a quiet, uncrowded spot may want to arrive early, since it draws steady tour-group traffic by mid-morning.