Loha Prasat or The Metal Palace or The Metal Castle,, and Rama III Park, Khwaeng Phra Borom Maha Ratchawang, Khet Phra Nakon, Krung Thep Maha Nakhon (Bangkok), Thailand
โลหะปราสาท และ สวนหลวง ร. ๓ แขวงพระบรมมหาราชวัง เขตพระนคร จังหวัดกรุงเทพมหานคร (กรุงเทพฯ) ประเทศไทย

The Metal Palace, Loha Prasat, โลหะปราสาท, is located adjacent to Wat Ratchanaddaram. The design is based on an old style Buddhist structure in Sri Lanka. It was begun in the early 19th century by King Rama III but was only recently completed. The prasat is essentially five concentric towers with the outer, middle and inner towers capped with cast iron spires (hence the name "Metal Palace"). The two un-capped towers are open walkways lined with shrines.