The Mae Usu Cave is a large limestone cave in Mae Mai National Park. It consists of three large chambers, each adorned with natural stalactites and stalagmites. Light enters through openings in the cave, striking the rocks and water inside, creating a beautiful sparkle. The cave's water originates from the Mae Usu River, which flows from the cave entrance to the rear before emptying into the Mae Mai River.

Mae Mai National Park, Mae Usu Subdistrict, Tha Song Yang District, Tak Province

The entrance fees for Mae Usu Cave in Mae Moei National Park, Tak Province, are as follows:

• Thai nationals: Adults 40 Baht / Children 20 Baht

• Foreign nationals: Adults 200 Baht / Children 100 Baht

Additional information for visiting the Mae Usu Cave:

• Local guide service: A fee is charged for local guides or children's guides.

(voluntary tip or as agreed locally).

• Clothing and preparation: A stream flows through the cave, and visitors must wade through knee-deep water; wearing shorts and bringing a flashlight is recommended.

• Best time to travel: Open only in winter and summer

(Closed during the rainy season due to high water levels in the cave).

• Further information can be found on the website of the Tourism Authority of Thailand (TAT).

Mae Moei National Park, Mae Usu Subdistrict, Tha Song Yang County, Tak Province

Opening hours: 7:00 AM – 5:00 PM

Opening hours for viewings: 07:00-17:00.