Sept 26, 2019

The Tham Phra Nakhon cave is a speleological and geological natural site, arguably Thailand's most spectacular. This natural wonder lies within the Khao Sam Roi Yot National Park and houses an astonishing structure: the royal pavilion. Still relatively undiscovered by tourists, this cave offers an incredible spectacle when sunbeams pierce through to illuminate its interior—a sight that deserves a place on your itinerary during a trip to Thailand!

The Park of 300 Peaks

Approximately 60 kilometers south of the beach resort town of Hua Hin, in Phrachuap Khiri Khan Province, you'll find the Khao Sam Roi Yot National Park. According to legend, the cave was discovered by chance over 200 years ago by Chao Praya Nakhon Sri Tha while seeking shelter from a storm.

Literally translated as "hill of 300 peaks," the park owes its name to its dramatic limestone cliffs, distinctive rock formations, and numerous caves. It also holds the distinction of being Thailand's first marine national park, complete with lagoons and freshwater marshes ideal for spotting a remarkable variety of birds and exceptional flora. Within the park, you may also encounter macaques or langur monkeys.

Don't miss the Khao Daeng viewpoint, which offers breathtaking vistas of the surrounding landscape. Yet what truly captivates visitors is the park's extraordinary natural cave with its almost otherworldly atmosphere.

The Tham Phra Nakhon Cave

You can reach the royal pavilion cave by several routes. Starting from Laem Sala Beach, you have the option of following hiking trails or arriving by long-tail boat (the traditional Thai wooden vessel). Once on the beach, a 450-meter climb leads to the cave entrance. Allow approximately 30 minutes to reach the top. The effort is quickly rewarded.

After conquering the ascent, massive rock formations begin to hint at the spectacle awaiting you. We dare you not to gasp when you discover the interior of this cave—a space we'd describe as "the earth's own cathedral". The sheer scale is breathtaking, and when sunrays pierce through the gaping openings of natural skylights, a magical aura bathes the entire space. Time itself seems to pause.

The Tham Phra Nakhon cave shelters a pavilion of soft, elegant colors: the royal pavilion. Built to commemorate King Rama V's visit in 1890, it has since been visited by his successors, each of whom left their signature on the walls—testament to this sacred space.

As you wander the cave, you'll also discover a prayer alcove and a rock formation shaped like a crocodile. Look upward and you'll spot a stone bridge, colloquially known as the Bridge of Death due to the numerous animals that have attempted to cross it, unsuccessfully.

Our tip: To witness the royal pavilion illuminated by sunlight, we recommend visiting the cave in the morning, ideally between 10 and 11 a.m.. For the chance to experience the cave in near solitude, visit on a weekday and avoid weekends, when both local visitors and tourists arrive in greater numbers.

Florine Dergelet

Florine Dergelet

A web writer for over 10 years, Florine Dergelet is a traveler driven by the desire to explore the world with an open heart. Each of her articles is an invitation to slow down, to listen, to understand. Because for her, traveling isn't about checking countries off a map—it's about weaving bonds (often invisible yet always powerful) with places, peoples, and all manner of creatures in the animal kingdom. Her philosophy? Advise travelers with integrity, raise awareness about animal welfare and cultural respect, and champion humble, sustainable tourism. Because the most beautiful memories are often born far from the spotlight, along a quiet trail, in the midst of conversation, or in the gentle breath of a world we finally take time to truly hear…