Huap Pa Tad is a valley surrounded by limestone mountains. It was once a large cave, but its ceiling collapsed, creating a wide valley illuminated by sunlight only during the day. Inside, Huap Pa Tad resembles a rainforest with numerous rare palm trees. Rare animals such as the tardigrade turtle and the pink dragon millipede have also been discovered here. Huap Pa Tad was discovered in 1979 by Phra Khru Santithamkoson (Luang Pho Thong Yod), the abbot of Tham Thong Temple. Later, the mountain was blasted to create a path into the valley.

Location: Tham Pratun Wildlife Sanctuary, Thung Na Ngam Subdistrict, Lan Sak District, Uthai Thani Province

Opening hours: 8:30–16:30

Thais: Adults 20 Baht, Children 10 Baht

Foreigners: Adults 200 Baht, Children 100 Baht

Location: https://goo.gl/maps/CipzWLN1tKKjQpvd6