Each of these places is recommendable holiday destination.
Poland's territory extends across several geographical regions, between latitudes 49° and 55° N, and longitudes 14° and 25° E. In the north-west is the Baltic seacoast, which extends from the Bay of Pomerania to the Gulf of Gdańsk.
This coast is marked by several spits, coastal lakes (former bays that have been cut off from the sea), and dunes.The largely straight coastline is indented by the Szczecin Lagoon, the Bay of Puck, and the Vistula Lagoon.The centre and parts of the north lie within the North European Plain. Rising above these lowlands is a geographical region comprising the four hilly districts of moraines and moraine-dammed lakes formed during and after the Pleistocene ice age.These lake districts are the Pomeranian Lake District, the Greater Polish Lake District, the Kashubian Lake District, and the Masurian Lake District.The Masurian Lake District is the largest of the four and covers much of north-eastern Poland.The lake districts form part of the Baltic Ridge, a series of moraine belts along the southern shore of the Baltic Sea.
According to statistics, in 2012 Kraków was visited by 7.3 million tourists including 2.1 million foreign travelers (over 30% of their grand total).175176 The visitors spent over 2.5 billion złoty in the city (without travel costs and pre-booked accommodations). Most foreign tourists came from Great Britain (over 25%), with German, French, Spanish, Italian and American visitors closely following. The Kraków tour-guide from the Lesser Poland Visitors Bureau indicated that not all statistics are recorded due to considerable number of those who come, staying in readily available private rooms paid by cash, especially from Eastern Europe.175 The main reasons for visiting the city are: its historical monuments, recreation as well as relatives and friends (placing third in the ranking), religion and business. There are 120 quality hotels in Kraków (usually about half full) offering 15,485 overnight accommodations.177 The average stay last for about 4 to 7 nights..
The survey conducted among the travelers showed that they enjoyed the city's friendliness most, with 90% of Polish tourists and 87% foreigners stating that they would personally recommend visiting it.175 Źródło: https://en.wikipedia.org/wiki/Krak%C3%B3w#Tourism