Eastern Europe is geographically defined as the area between the Baltic Sea to the north and the Adriatic, Mediterranean and Black seas to the south, and includes the Great Hungarian Plain along with a number of mountain ranges and the Ural River. The 380,000-acre Bialowieza Primeval Forest stretches from Poland to Belarus.
Possibly the most famous mountain in the world, Mount Olympus, is part of the Balkan Mountains, which extend from Yugoslavia through Bulgaria. According to World Atlas, the mountain range also runs through Greece, whose ancient inhabitants declared Olympus home to the gods. The Carpathian Mountains straddle the border of southern Poland and Slovakia before running south through the Ukraine into Romania. The volcanic Caucasus Mountains appear from the Black Sea to the Caspian Sea. The Ural Mountains, which form a physical border between Europe and Asia, stretch more than 1,600 miles from north to south.
According to the Hungary Tourist Guide website, the Great Hungarian Plain is largely made up of "puszta," which is Hungarian for "flat land." Although it features a few small forests, the plain is primarily composed of grassland watered by snow run-off from the Alps and Carpathian Mountains.
The Ural River serves as the traditional natural border between Europe and Asia, according to tourism website Kazakhstan Discovery.