The land that is now Constitution Gardens was originally underwater, and was dredged in the early 1900s by the Army Corp of Engineers. The U.S. Navy held temporary offices there soon after, during WWI. Those buildings were demolished in 1970 and the National Park was established in their place, in time for a 1976 dedication. The park's lake includes a small, pedestrian-only island, where the Declaration of Independence Memorial lies — hence the name Constitution Gardens. There are other monuments on the 50-acre park, including the Vietnam Veterans Memorial Wall. Each year, millions of people visit this haven within the bustling city.