One of the most significant religious sites in Phatthalung is the royal temple, recognized as the first of its kind in the province. It has also been favored by several Thai monarchs and members of the royal family who have visited. Nestled at the foothills of Khu Ha Sawan (also known as the Broken Head Mountain), this temple is situated on a plateau surrounded by mountains on almost all sides. Locals affectionately refer to it as "Wat Khu Ha Suang" or "Wat Suang." It is believed that the temple was constructed approximately between 2112 and 2133 B.E. during the reign of King Maha Thammaracha of Ayutthaya, though there is no definitive evidence to confirm the exact date or the identity of the founder. In addition to its serene and lush atmosphere, the highlight of this temple is the "Khu Ha Sawan Cave," also known as the "Blue Cave" or "Cave of Buddha." This cave is remarkable for the inscriptions of the abbreviated royal signatures of three Thai kings—King Chulalongkorn, King Phiphatkhet, and the current King—along with that of Her Majesty Queen Sirikit, the Queen Mother. This is a source of great pride for the people of Phatthalung. Inside the cave, there is a large reclining Buddha statue as well as smaller clay Buddha figures, arranged neatly in rows to the north, south, and west, totaling 37 statues for visitors to pay their respects. Location: Situated on Khu Ha Sawan Road, Khu Ha Sawan Subdistrict, Mueang District, Phatthalung Province.