Poland's landforms include the Baltic sea, beaches, sand dunes, deserts, mountains, hilly plains and lowlands, along with various bodies of water, such as rivers and lakes. The mountainous regions are in the southern portion of the country, whereas the beaches and the Baltic sea are in the northern region. The central region of the country has a large flat region, or lowlands, where many rivers flow into the hilly areas.
There are 21 mountains in Poland that separate the country from Slovakia. The Bledow Desert, also in the south of Poland, is one of Europe's five deserts. The Bledow Desert is home to some of the highest sand dunes in the world.
The northern portion of the country is where the beaches are located, along the Baltic coast. There are numerous sand dunes and small cliffs. The beach area is smooth, and the cliffs are scattered up and down the coast, as are the dunes.
The rivers in Poland are among the longest in the world. The Oder river is a part of the country's western border, and the Vistula river is 651 miles long. There are many lakes and ponds in the central portion of the country as well.