Barbados is 437 times larger than West Potomac Park.
Area: 430 km2 World Factbook
Population: 289,680 (July 2014) World Factbook
Barbados is a sovereign island country in the Lesser Antilles. It is 34 kilometres in length and up to 23 kilometres in width, covering an area of 432 square kilometres. Wikipedia
Area: 1 km2 calculated
West Potomac Park is a U.S. national park in Washington, D.C., adjacent to the National Mall. It includes the parkland that extends south of the Lincoln Memorial Reflecting Pool, from the Lincoln Memorial to the grounds of the Washington Monument. Wikipedia