Built as a summer palace by King Rajakhipok (Rama VII) for his Queen Rambai Barni, Wang Klai Kangwon, remains the home of HM King Bhumipol, HM Queen Sirikit when in Prachuab Kiri Khan and neighbouring provinces. Now long after this royal seaside retreat became popularised among commoners, it's open to the public when royalty's not in residence.
It was designed in the Spanish style to suit the tropical climate, by Prince Iddhidesarn Kridara, a graduate from L'Ecole Des Beaux Art and the director of the Department of Fine Art. Site preparation began in October 1926 and on 21 September 1927 construction started, paid for by the Privacy Purse. Its completion was celebrated on 10-11 April 1929.