Cross Mountains, Float, Climb, and Explore Unimaginable Beautiful Stalactites

Tham Nok Nang Aen

Tham Nok Nang Aen (or Swallow Cave) is another interesting place in Lam Khlong Ngu National Park that is worth your time. Part of the Khlong Ngu River flows through it. The water first flows underground before the cave’s entrance only showing up again in the middle of the cave itself before disappearing underground again at the end of the cave. The length of the stream throughout the cave is about 3 km. Some parts of the cave ceiling have been eroded and collapsed to the floor of the cave in piles. A collapsed ceiling is called a Karst Window and there are a total of 6 in this cave. The spaces in the cave ceiling allow light to shine in, as well as provide ventilation. The size and beauty of the natural art inside the cave are indescribable. The spaciousness of the cave, large calcite-curtains on the walls, stalagmites and stalactites of various shapes and sizes are the works of nature formed after millions of years.

The cave is lit by the sunshine all throughout so there is no need for flashlight. However exploring the cave still imparts a sense of adventure and excitement because reaching the final Karst Window will require trekking through forest, crossing a fast-flowing stream, swimming, and rock-climbing.