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Vajiralongkorn Dam (Khao Laem Dam)

Thong Pha Phumi District, Kanchanaburi

Thailand’s Pioneer Concrete-Faced Dam with Majestic Mountain Lake Views Ranked as the 4th largest reservoir in Thailand, Vajiralongkorn Dam (originally known as Khao Laem Dam) is a magnificent engineering icon built to harness the power of the historic 390-kilometer-long Khwae Noi River. Holding a proud distinction as Thailand’s very first rock-fill dam faced with reinforced concrete, the structure stands an impressive 92 meters tall, with a crest width of 10 meters and stretching over 1,019 meters long.

The massive reservoir spans across both Thong Pha Phumi and Sangkhlaburi districts. Visitors can comfortably drive right up onto the sweeping crest of the dam to experience jaw-dropping, panoramic views where the expansive blue lake meets the misty mountain ridges of Kanchanaburi’s western highlands.

Highlight Activities & Lake Adventures

The vast lake above the dam serves as a massive playground for nature lovers and outdoor enthusiasts:

• Scenic Boat Cruises: Rent a local longtail boat to cruise across the calm waters, surrounded by dramatic limestone cliffs and lush jungle backdrops.
• Macapuno Coconut Island: Take a boat trip to visit a unique island inside the reservoir dedicated to growing rare, soft-fleshed Macapuno coconuts (Maphrao Khati).
• Sport Fishing: During the designated fishing seasons, the reservoir becomes a top destination for anglers looking for a thrilling challenge with local freshwater game fish.

Getting There & Directions

The dam is located 149 kilometers from Kanchanaburi Town Center and about 278 kilometers from Bangkok (approx. a 3.5 to 4-hour drive).

• By Private Car (Highly Recommended): From Bangkok, take Phetchasem Road or the Borommaratchachonnani (Phutthamonthon) route into Kanchanaburi Town. From there, follow the scenic Highway 323 straight toward Thong Pha Phumi District (149 km). Once you reach Thong Pha Phumi town, the entrance to the dam is just another 20 kilometers away. Vehicles can be driven directly onto the dam crest where spacious parking is available.
• By Public Transport: Take a public bus or van from Bangkok to Kanchanaburi Town, or hop on the weekend excursion train from Bangkok Noi (Thon Buri) Railway Station. Once at the Kanchanaburi main bus terminal, catch a local bus to Thong Pha Phumi. From Thong Pha Phumi town, you can easily hire a local taxi or songthaew to take you to the dam and nearby attractions.