Rura Park in Katowice
Located on the eastern fringe of the Park of Recreation & Culture you'll find what is apparently the largest kids' playpen in Poland. Designed for ages 3 to 12, this indoor rumpus castle is full of ball pits, slides, labyrinths, building blocks and more.
A birthday party magnet, there's even an attached pizza place.
Address: 1 Atrakcji Avenue, Park of Culture & Recreation, Chorzow