Dunajec river is 251 km long, and flowing northeast into the Vistula River. Its inflows such as: Biely (White) and Čierny (Black) Dunajec, Biela voda (White Water) as well as Javorinka are all fed from the Pieniny Mountains.  

Koscieliska Valley is the second largest valley in Polish Tatras. It is 9 km long, and covers the area of 35 km².  more »

Morskie Oko is the largest lake in the Polish part of the Tatra Mountains. It covers the area of 34.9 ha, and is 50.8 deep. It lies 1395m asl.  

Tatra National Park contains about 650 caves. Wielka Sniezna - Wielka Litworowa cave is the longest, with 18,000 m of tunnels and the deepest (814 m in depth). Only 6 caves are accessible for visitors.  

Wielki Staw in the Valley of Five Ponds is the deepest and the secondo largest in Polish Tatras. It reaches 79.3 m in depth, with capacity of 12,967 m³.  

Waterfalls and rising springs are very often found and they are one of the Park attractions. The best known waterfall is Wodogrzmoty Mickiewicza, on the trail to Morskie Oko Pond. The The largest is Wielka Siklawa (70 m).