Geography of Poland

The Polish landscape consists almost entirely of the lowlands of the North European Plain, at an average height of 173 metres, though the Sudetes (including the Karkonosze) and the Carpathian Mountains (including the Tatra mountains, where one also finds Poland's highest point, Rysy, at 2,499 m form the southern border. Several large rivers cross the plains; e.g. the Vistula (Wisla), Oder (Odra), Warta the (Western) Bug.

Poland also contains over 9,300 lakes, predominantly in the north of the country. Masuria (Mazury) forms the largest and most-visited lake district in Poland. Remains of the ancient forests survive: see list of forests in Poland, Bialowieza Forest. Poland enjoys a temperate climate, with cold, cloudy, moderately severe winters and mild summers with frequent showers and thunderstorms.

Source: http://en.wikipedia.org/wiki/Poland