Blue Lagoon 1 & Tham Phu Kham
Turquoise mineral waters under shady banyan trees and holy cave shrine

Blue Lagoon 1 is Vang Vieng’s legendary freshwater swimming hole, fed by natural underground limestone springs. Above the shimmering turquoise pool stands Tham Phu Kham cave, an impressive subterranean cavern sheltering a revered reclining Bronze Buddha bathed in natural sunlight.
Key Highlights
- Vivid turquoise spring water constantly refreshed from karst mountains
- Tree branch jumping platforms and rope swings into deep natural pools
- Sacred Tham Phu Kham cave featuring reclining Buddha statue
- Shaded bamboo riverside gazebos for relaxation and picnics
Blue Lagoon 1 & Tham Phu Kham — Blue Lagoons
Cool off in the refreshing waters, leap from low branches into the deep pool, and then hike the short 15-minute trail up to the Tham Phu Kham cavern to pay respects at the Buddha shrine.
Practical Notes
- Wear a life vest if you are not a confident swimmer; sections of the lagoon are deep
- Modest attire covering shoulders and knees is mandatory when entering Tham Phu Kham shrine
- Rent or bring a headlamp for exploring deeper chambers of Tham Phu Kham



