Tham Chomphon Arboretum, located in Chom Bueng Subdistrict, Chom Bueng District, Ratchaburi Province, is a natural tourist attraction that seamlessly blends geological, historical, and ecological value with a forest ecosystem. Under the care of the Royal Forest Department, the area has been developed into a lush arboretum surrounded by diverse tree species, particularly teak and other large trees that cover the entire area. This creates a tranquil and cool atmosphere throughout the year. Despite being a well-known tourist destination in Ratchaburi Province, it has maintained its natural beauty relatively well, making it ideal for those seeking relaxation amidst nature while learning about the history and geology of limestone caves in western Thailand.

Tham Chomphon is considered one of the most famous limestone caves in Ratchaburi Province and holds historical significance due to its visit by King Chulalongkorn (Rama V) and Queen Saovabha Phongsri in 1895 during a tour of the western provinces. The royal monogram "C.P.R. 114" is still inscribed at the cave entrance, serving as important historical evidence. Later, His Majesty the King bestowed a new name upon the cave, "Chom Phon Cave," because he observed a stalactite formation resembling the epaulets of a field marshal. This made the cave a significant site clearly linked to the history of the Thai royal court. Furthermore, the initials of several monarchs and members of the royal family who have visited the cave are inscribed inside, reflecting the long-standing importance of this natural tourist attraction.

The most striking feature of Chom Phon Cave is its large limestone chamber with spacious halls. The interior is naturally cool and humid, allowing visitors to easily explore via a well-maintained concrete walkway with handrails and lighting. The cave is filled with naturally formed stalactites and stalagmites, created by the accumulation of minerals from dripping underground over tens of thousands of years, resulting in unique and beautiful shapes. Many formations have been named after their appearance, such as Curtain of Visions, Royal Throne, and a large rock curtain resembling a piece of fabric. Some of the stalactites and stalagmites still have water dripping continuously, demonstrating that the natural formation process continues to this day.

One of the most striking features of the cave is the central hall, which has a large opening in the ceiling, allowing natural light to directly illuminate the interior. Around late morning to midday, sunlight streams through the ceiling openings, illuminating the reclining Buddha statue inside the cave. This creates a beautiful and serene spectacle, a highlight of any visit. Many tourists prefer to come during this time to take photos and experience the unique atmosphere of Tham Chom Phon Cave. Besides the reclining Buddha, the cave houses several other Buddha statues and sacred objects, making it both a natural tourist attraction and a place for people to pray and seek blessings.

The surrounding arboretum is a large green space ideal for relaxation and nature walks. The area is home to diverse forest plant species, as well as small wild animals and a natural population of monkeys. These monkeys are a signature sight at Tham Chom Phon Cave and can be seen from the parking lot to the cave entrance. Many tourists buy food to feed the monkeys from the shops near the entrance. However, signs warn visitors to be careful with their belongings, as some monkeys are accustomed to tourists and may easily steal items or food. The atmosphere is therefore a perfect blend of bustling activity from tourists and the tranquility of nature.

Conveniently located not far from Ratchaburi city and on the same route as Suan Phueng district, Tham Chom Phon Cave is easily accessible. This makes Tham Chom Phon Arboretum a popular stop for travelers heading to natural attractions on the western side of the province. Visitors can easily explore the cave and arboretum in about 1-2 hours, making it suitable for family trips, a stopover during travel, or for studying nature and geology. Overall, the place offers more than just the beauty of the cave; it clearly reflects the connection between nature, history, and the local culture of Ratchaburi.

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How to Get There

• From Ratchaburi city center, drive along Highway 3087 (Ratchaburi - Chom Bueng - Suan Phueng route) for about 30 kilometers. As you enter Chom Bueng town, the entrance to the arboretum will be on your left, located close to Mubarak Chom Bueng Rajabhat University.

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Travel Tips

• Visit in the morning or before noon for cooler weather.

• The best sunlight effect inside the cave appears around 11:00 AM–1:00 PM.

• Wear non-slip shoes because some cave areas can be damp.

• Be cautious of monkeys near the entrance and parking area.

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Admission Fees:

• Free admission.

Opening Hours:

• Open daily from 09:00 AM – 04:30 PM.