Caspian Sea of around 149,200 square miles (386,400 square km)— bigger than the region of Japan—and its surface lies somewhere in the range of 90 feet (27 meters) below sea level. The sea bed in the southern part reaches as low as 1,023 m (3,356 ft) below sea level, which is the second lowest natural depression on earth after Lake Baikal (−1,180 m, −3,871 ft). The ancient inhabitants of its coast perceived the Caspian Sea as an ocean, probably because of its saltiness and large size. The sea has a surface area of 371,000 km (143,200 sq mi) (not including the detached
Burlington, Massachusetts on the northeast, Woburn on the southeast, and Lexington on the south. Burlington is south of Lowell, northwest of Boston, southeast of Fitchburg, and from New York City. and Its highest point is Greenleaf Mountain ( above sea level), the lowest point is the Great Meadow above sea level. The elevation at Town Hall is above sea level. The largest body of water is the Mill Pond Reservoir in the eastern part of the town. According to the United States Census Bureau, the town has a total area of , of which is land and , or 0.59%, is water.