Largest cities
Warsaw 1,862,000 pop., 2,028,000 urban aggl.
Lodz 652,000 pop., 798,000 urban aggl.
Poznan 538,000 pop., 680,000 urban aggl.
Gdansk 487,000 pop., 874,000 urban aggl.
Katowice 279,000 pop., 1,903,000 urban aggl.
Highest mountains
Rysy 2,499 m (8,199 ft)
Longest rivers
Vistula 1,022 km (635 mi)
Oder 866 km (538 mi) total, 752 km (467 mi) in Poland
Bug 774 km (481 mi) total, 590 km (367 mi) in Poland
Largest lakes
Sniardwy 113 km² (44 sq mi)
Largest islands
Usedom 445 km² (172 sq mi) total, 72 km² (28 sq mi) in Poland
Wolin 265 km² (102 sq mi)