Phraya Nakhon Cave is located in the Khao Sam Roi Yot National Park in Prachuap Khiri Khan province
The Phraya Nakhon cave is best known for the Kuha Karuhas pavilion in the main chamber. The pavilion was built at the end of the 19th century for the visit of King Chulalongkorn the Great (Rama 5). Later, King Prajadhipok (Rama 7) and the present King of Thailand, King Bhumibol Adulyadej (Rama 9) also visited the cave twice.