Also known as the Reunification Palace, this Vietnamese landmark was constructed on the site of an old French-colonial governor’s residence. It has a remarkably varied past; it housed Japanese officials during World War II and was later the home of the president of South Vietnam during the Vietnam War. The imposing, broad, angular building played a seminal role in Vietnamese history: It was here on April 30, 1975, in an episode that came to be known as the Fall of Saigon, that a North Vietnamese army tank smashed through the gates, symbolically ending the Vietnam War. A tour of the palace is a step back decades in time—you'll encounter grand, formal rooms used as banquet halls, reception rooms, and government offices. You can also navigate through basement tunnels and former bunkers.