The territory consists of three main islands: Saint Thomas, Saint John, Saint Croix, as well as several dozen smaller islands.
Most of the islands, including Saint Thomas, are volcanic in origin and quite hilly. The highest point is Crown Mountain on Saint Thomas at 1,555 ft (474 m).
Saint Croix, the largest of the US Virgin Islands, has a much flatter terrain.
Scattered streams help drain the islands, and coral reefs and white sand beaches are common.