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Photo: BerryJ, CC BY-SA 4.0 via Wikimedia Commons
Probably the most famous attraction in the national park. The cave is accessible via a short but steep hike through the forest before reaching the cave, around 2 km one way. The first chamber is a sinkhole with a natural bridge on top, and the second chamber has a Royal Pavilion which was built during the reign of King Rama V.
The hike can be substantially shortened by taking a boat (400 baht fee round trip) from Bang Pu beach, which will bypass around 1.5 km, including one hill but there is still around 100 meters of altitude gain in 500 metres. However, it is best to check with the national park beforehand if the boats are running, as they are seasonal.
The Phraya Nakhon cave is a cave in Khao Sam Roi Yot National Park, Hua Hin, Prachuap Khiri Khan Province, Thailand. It features the royal Kuha Karuhas Pavilion, illuminated by natural sunlight through a large skylight. The cave is accessible by a forested hike and has two chambers with rock formations as well as ancient inscriptions.
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หาดแหลมศาลา
A nice white sand beach which is the starting point for the ascent to Phraya Nakhon Cave. In order to get there, you need to either hike for 1.5 km up and down a hill or pay 400 baht for a boat ride to bypass the hill (roundtrip), starting at Bang Pu village. Because this is a part of the national park, amenities are slightly limited but there is a restaurant. Because the sand has a mixture of blood, the water is not as clear as that of Hua Hin or Southern Thailand.
ถ้ำไทร
A cave with a chamber, easier to traverse than Kaeo Cave
ถ้ำแก้ว
A cave located in the hills. This 500-metre hike takes you up and then into the cave. Parts of the cave can be slippery at times and there are big ledges. Also note to bring closed shoes because of the sharp rocks and a proper light source (there are torches available for rental at the entrance). It can be very humid and hard to breath at certain parts of the cave.
หาดสามพระยา
Nice white sand beach located in the area of the national park.
ล่องคลองเขาแดง
A boat ride starting Khao Daeng canal with great views of the karst mountains, coastal forests and mangrove forests. The boat ride takes around one hour and can be arranged at Khao Daeng village.
จุดชมทิวทัศน์เขาแดง
A very short but steep hike that rewards you with a great view of the national park, the community surrounding the area and the Gulf of Thailand. The entrance is located very close to the park's headquarters. Any visits before 8AM and after 3PM must be pre-arranged with the national park. It is best to go up there as early as possible to beat the heat during the day.