Khao Wang, also known as Phra Nakhon Khiri, is a historical park located in Phetchaburi, Thailand. It features a hilltop palace complex built during the reign of King Rama IV in the 19th century. The site includes several impressive structures, temples, and gardens, offering visitors a glimpse into Thailand's royal history. The area is popular for its scenic views and cultural significance. Visitors can explore the various buildings, including the main palace, and enjoy the surrounding natural beauty. Khao Wang is a key attraction for those interested in Thai history and architecture.