Tham Hong is a destination for travelers who enjoy adventure and wish to explore nature up close. The cave is located in Krung Ching Subdistrict, Nopphitam District, within the expansive area of Khao Luang National Park. Its most distinctive feature is that it is a river cave, with a freshwater stream flowing through the cave all year round, keeping the water inside cool, clear, and refreshing.

Visitors exploring the cave must walk through the stream, with water levels generally ranging from shin to waist height_. Inside, the cave is divided into several chambers filled with fascinating stalactites and stalagmites that are still actively forming. When light shines on the cave walls, the calcite crystals sparkle beautifully, resembling gemstones embedded in stone.

The most iconic feature is a limestone formation that resembles a swan spreading its wings, which inspired the name “Tham Hong” (Swan Cave). There are also small cascading waterfalls inside the cave, creating natural echoes and a soothing soundtrack that resonates throughout the chambers. The atmosphere inside is dark, cool, and humid, evoking both excitement and mystery.

The cave route often exits on the opposite side of the mountain, revealing lush green forest scenery. The rich ecosystem around Tham Hong offers opportunities to spot unique plant species and small cave-dwelling animals. As the cave remains relatively unknown, it retains a peaceful and pristine environment.

For safety reasons, visitors must be accompanied by national park officers at all times. The water flowing through Tham Hong is part of the upstream ecosystem that sustains the Krung Ching forest and nearby communities. The fresh air and natural surroundings make this journey a perfect way to recharge both body and mind.

Whether you are an adventure photographer or a geology enthusiast, Tham Hong offers a memorable underground experience shaped by water and time over millions of years. Exploring the cave with only a headlamp guiding your way allows you to truly feel the power and grandeur of nature. After exiting the cave, visitors can also explore the peaceful lifestyle of the nearby Krung Ching community. Tham Hong is therefore an ideal addition to any eco-adventure itinerary in Nopphitam.

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How to Get There

• By car: From Nakhon Si Thammarat city, take Highway 4016 toward Nopphitam District. At Nopphitam junction, turn onto Highway 4186 toward Krung Ching Waterfall. Follow the signs to Khao Luang National Park Ranger Station Khl.6 (Tham Hong). The distance is approximately 70–80 kilometers from the city.

• By public transport: Take a songthaew or minivan from Nakhon Si Thammarat to Nopphitam District. From there, hire a motorcycle taxi or local vehicle to reach the ranger station, as the access road from the main highway is quite remote.

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Travel Tips

• A park officer is required; always contact the ranger station before entering the cave.

• Wear quick-dry clothing and bring a change of clothes.

• Use non-slip, closed-toe shoes suitable for wet conditions.

• Bring a waterproof flashlight or headlamp and a dry bag for electronics.

• Do not touch stalactites or stalagmites to prevent damage.

• The cave is accessible most of the year, except during heavy rainy seasons. (November–December)

• Water levels may change depending on weather conditions; strictly follow staff instructions.

• Do not leave any trash inside the cave or within the park area.

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Entrance Fee:

Khao Luang National Park entrance fee

• Thai nationals: Adults 40 THB / Children 20 THB

• Foreigners: Adults 200 THB / Children 100 THB

Opening Hours:

• Open daily from 8:30 a.m. – 4:30 p.m.