Pi Leh Bay is a stunning enclosed lagoon located on the uninhabited island of Ko Phi Phi Lee in the Phi Phi Islands, part of southern Thailand. Often described as one of the most beautiful natural lagoons in the region, it is surrounded by towering limestone cliffs that rise steeply from the emerald-green water.

The bay is almost completely enclosed by rock walls, with a narrow opening to the sea that allows boats to enter. Inside, the water is exceptionally calm and clear, shifting between shades of turquoise and deep green depending on the light and depth. The sheltered conditions create a tranquil environment that contrasts sharply with the open Andaman Sea just outside the lagoon.

Today, Pi Leh Bay is a popular stop on boat tours around the Phi Phi Islands, often visited alongside nearby attractions like Maya Bay. Swimming, snorkelling, and sightseeing are common activities, though access is regulated to help protect the fragile ecosystem. Its dramatic cliffs and still waters make it one of the most visually striking natural sites in Thailand.