Phra Yanasak Cave is a large cave located in the Khao Sam Roi Yot National Park in Prachuap Khiri Khan Province. It is about 500 meters away from Laem Sala Beach and approximately 17 kilometers north of the national park headquarters. The main attraction of this cave is the Khuha Kharakhan Throne Room, situated in the heart of the cave. The pathways inside the cave are relatively spacious and there are openings that allow natural light to illuminate the interior, so there's no need for a flashlight. Phra Yanasak Cave is easy to walk through and poses no danger. Visitors can reach the cave via two routes: by boat, which can be rented from Bang Pu village at a cost of around 400 baht per boat, accommodating about 7-8 people and taking approximately 20 minutes to navigate around the mountain. Alternatively, there is a hiking trail over Khao Tien, covering a distance of about 530 meters (a bit tiring but enjoyable, offering a refreshing breeze and stunning views in a pleasant atmosphere). This option is particularly suitable for those with a good level of fitness.