Lincoln Memorial Reflecting Pool
It is on the west side of the National Mall, and is about 2,029 feet (618 m) long and 167 feet (51 m) wide. It is about 18 inches (46 cm) deep on the sides and 30 inches (76 cm) deep in the middle. It holds approximately 6,750,000 U.S. gallons (25,500,000 L) of water.