Phraya Nakhon Cave is a stunning natural attraction located in Koh Tarutao National Park, Thailand. The cave is famous for its large opening that allows sunlight to illuminate the interior, creating a magical atmosphere. Inside, visitors can find a beautiful royal pavilion called Khuha Kharuhat, which was built in 1890 for King Rama V. To reach the cave, tourists typically hike through lush forests, which adds to the adventure. The trek takes about 30 minutes and offers scenic views of the surrounding landscape. Phraya Nakhon Cave is a popular spot for photography and exploring the unique rock formations.