Thalae Nai Lake is an emerald saltwater lake in the middle of an island is encircled on all sides by limestone cliffs, but linked by an underground tunnel to the sea. Reaching the lake entails a strenuous climb of 40 minutes or so, but is rewarded with a spectacular view across the whole park.
Climb some steep stairs in order to see the lake with magnificent water surface color. Emerald saltwater lake is called ‘Thale Nai‘.
The lake is surrounded by limestone cliffs and has an underwater cave that is connected to the sea.
Location: Ang Thong Marine National Park, Koh Samui District, Surat Thani 84140 Thailand