The Phaya Thai Palace has been built by King Rama VI, who lived here from 1919 during the last years of his reign. After his death, the palace was turned into one of the most luxurious hotels in Southeast Asia, a radio station and a military hospital. The palace is worth seeing, as there is a lot to take in. The most important building, the Phiman Chakri Hall, is made in a beautiful Art Nouveau style with silk wallpapers and ornate murals. Every Saturday, volunteers give two free guided tours through the palace that take about two hours. It is also possible to visit on weekdays, but you must call ahead to make an appointment and pay 500 baht.