You should try or visit at least at once:

1. Polish food like pierogi, bigos, żurek, barszcz, oscypek, placki ziemniaczane, kotlet schabowy or some Polish sweets like sękacz, sernik, kremówka and sweets like krówka or ptasie mleczko 
2. Eating in a Bar Mleczny or in a snack bar, which is similar to Spanish tapas bars, but serves Polish food and drinks
3. Going by train from Zakopane to Hel… That’s challenging! 
4. Sailing in the Masurian Lake District
5. Canoeing on one of the river or canal in Suwalszczyzna or Drawskie region
6. Skiing and snowboarding in Tatra Mountains
7. Wandering over Bieszczady mountains
8. Meet the Polish Bison in Białowieża National Park
9. Climbing up the Palace of Culture and Science in Warsaw and take an advantage of a great view from the view terrace on the 30th floor
10. Doing windsurfing or kite surfing in Hel Peninsula
11. Visiting a real Polish village
12. Listening to Hejnał Mariacki (Cracow’s Anthem), which is played by a trumpeter on the highest tower of St. Mary's Church in Cracow and discovering the history of the anthem
13. Finding out how many dwarfs there are in Wrocław
14. Supporting the Poland football team or at least singing the song which Poles sing after losing a game Nic się nie stało, Polacy, nic się nie stało… (No big deal, Poles, no big deal) and supporting our Winter ski jumpers (it’s another most popular, even „national” discipline)
15. Try to draw or dye Easter egg
16. Wear waterproof jacket on Wet Monday during Easter
17. Challenge yourself and eat as many doughnuts as you can on Fat Thursday
18. Don’t go on school on the first day of Spring (Truancy Day)
19. Get wasted during big music festival in Poland – Heineken Open’er or Woodstock
20. Pour hot wax into cold water through a key hole and try to read your fate from the shape of the congealed wax on the eve of St. Andrew’s Day (Andrzejki)

Source: Academic Planner for Erasmus+ students in Poland, Foundation for the Development of the Education System (FRSE), Warsaw 2014