How to Read the 2.8-Meter “Smile of Baekje” in Gayasan Valley

Why National Treasure No. 84 Stands at the Entrance to the Gayasan Valley

The Seosan Yonghyeon-ri Rock-carved Buddha Triad is a late Baekje-period rock-carved Buddhist sculpture engraved on a cliff in the Gayasan Valley of Unsan-myeon, Seosan-si, Chungcheongnam-do. It is thought to date from the late sixth to early seventh century, or around AD 600. Located along the route from the Taean Peninsula through the Gayasan Valley to Buyeo, the Baekje capital, it is regarded as a heritage site demonstrating exchanges with China and the influx of Buddhist culture at the time.

The central principal Buddha is a 280 cm-tall standing Tathagata. To the viewer’s right is a 170 cm-tall standing Dipankara Bodhisattva, while a 166 cm-tall Maitreya pensive figure is placed on the left. The combination of a standing bodhisattva and a seated pensive figure is rare and is believed to represent Shakyamuni, Maitreya, and Dipankara Bodhisattva from the Lotus Sutra.

Hong Sa-jun’s 1959 Investigation and National Treasure Designation on December 20, 1962

This Buddhist sculpture became widely known through the story that Hong Sa-jun, then director of the Buyeo National Museum, found it in 1959 after hearing a woodcutter’s tale about “Inbawi” during a cultural heritage field survey. It was subsequently designated National Treasure No. 84 on December 20, 1962. In 2010, its name was changed from “Seosan Rock-carved Three Buddhas” to its current name, “Seosan Yonghyeon-ri Rock-carved Buddha Triad.”

For conservation, a protective pavilion was built in 1964, and in 2007 the pavilion was removed and a corrosion inhibitor was applied. From 2007 to 2008, efflorescence and pollutants were removed and conservation treatment was carried out on surrounding cracks. Further conservation treatment took place in 2014. Rather than viewing the rock carvings from close range, it is advisable to observe the overall composition and surface condition together from the designated viewing line beyond the railing.

Visiting Hours: 09:00–18:00, Extended Until 21:00 in July and August

The site is open year-round, with regular hours from 09:00 to 18:00. In July and August, hours are extended from 09:00 to 21:00. Since no separate admission fee is listed in the official information, admission is presented as free. Before setting out, it is safest to contact the management office at 041-660-2538 to ask about operating changes and the availability of guided interpretation.

The same number can be used to request a tour at the management office. Previous guidance from Seosan City stated that a cultural tourism interpreter was stationed there from 10:00 to 17:00, but availability may vary by season. Foreign-language assistance and group tours should therefore be confirmed by phone before visiting.

• Address: 65-13, Maeasamnjonbul-gil, Unsan-myeon, Seosan-si, Chungcheongnam-do
• Visiting hours: Open year-round, 09:00–18:00
• Summer extension: July–August, 09:00–21:00
• Inquiries: 041-660-2538
• Official information: https://www.seosan.go.kr/public/contents.do?key=838

30–40 Minutes from Seosan Public Bus Terminal on a Bus Bound for Unsan or Wonpyeong

By public transportation, take a local bus bound for Unsan or Wonpyeong from Seosan Public Bus Terminal. According to Seosan City’s official information, buses run approximately every two and a half hours, and the journey from the terminal takes about 30–40 minutes. It is best to plan the return bus schedule first. Since this is not an urban tourist attraction with frequent departures, check the last bus and stop location again on the day of your visit.

By car, the recommended route is to approach from Seosan IC on the Seohaean Expressway, following National Route 32 toward Unsan and Gopung-ri. From the Seoul area, another suggested route is to exit at Haemi IC via Anseong JC and Seopyeongtaek JC, then pass through Deoksan, Unsan (Wonpyeong-ri), Local Route 618, and Gopung-ri. Parking fees and the number of parking spaces are not listed on the official page, so it is better to contact the management office in advance.

5–10 Minutes over a Bridge and Stone Steps: Non-Slip Shoes Recommended over a Stroller

From the entrance, the route crosses the valley, passes the management office and the Bulimun Gate, and then climbs stone steps to the triad. A field report by Chungcheongnam-do in May 2025 recorded an uphill walk of approximately 5–10 minutes along a route with many stone steps. Including time spent at the heritage site, allowing 30–50 minutes for the visit is reasonable.

The route is short but is not a flat museum-style walkway. The stone-step section may be challenging for visitors with mobility difficulties, wheelchair users, and families with strollers, so check in advance whether accessibility assistance is available. The steps and areas around the valley may become slippery after rain, so shoes with slip-resistant soles are recommended.

The 280 cm Principal Buddha’s Hand Gestures and the Cliff Inclined at 80 Degrees

The standing principal Tathagata is characterized by a round, full face, semicircular eyebrows, almond-shaped eyes, a low and broad nose, and a smiling mouth. The right hand is raised in the abhaya mudra, signifying the dispelling of fear, while the left hand is lowered in the varada mudra, signifying the granting of wishes. A lotus is carved inside the halo, with flame patterns on the outside.

Dipankara Bodhisattva holds a cintamani jewel with both hands and wears an ornate crown. The pensive figure rests the right leg over the left and supports the chin with the fingers of the right hand. Seosan City’s cultural tourism information explains that the rock face was inclined at approximately 80 degrees so that wind and rain would not strike it directly. The changing impression of the expressions depending on the direction of light is another point of interest when observing the site.

Combine It with Gaesimsa Temple and Bowonsa Temple Site, but Leave Time for Each Place

Gaesimsa Temple and the Seosan Bowonsa Temple Site are often mentioned together in the same Unsan-myeon and Gayasan area. Seosan City’s cultural tourism page lists Gaesimsa, Munsusa, the placenta chamber and stele of King Myeongjong of Seosan, and the Seosan Yeomiri Stone Standing Buddha as nearby attractions. However, with buses running approximately every two and a half hours, public-transport travelers will find it more practical to consider taxi transfers or a private car rather than fitting many places tightly into one day.

If you are visiting only the Rock-carved Buddha Triad, allow 30–50 minutes for the stairs and viewing, with additional time if you wish to hear an explanation. In the morning, arrive after the regular opening time of 09:00 to distinguish the three carved figures. In summer, you can take advantage of the extended hours until 21:00. However, return transportation late in the day must be arranged separately.