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
Kellerwald the Edersee has run since 2005 the 68 km-long "Urwaldsteig Edersee" ("Virgin Forest Trail") through the oak forests on the lake's north shore and through the Kellerwald-Edersee National Park south of the lake. The Kellerwald's lowest point is found at the edge of the Eder Valley on the outskirts of Affoldern, not far from, and below the water level of the Affolderner See (reservoir); the point is precisely 194 m above sea level. On the other hand, the Kellerwald's highest point is on the Wüstegarten (675 m above sea level). Among the Kellerwald's and the two herein mentioned parks' best