A baroque town hall stands in the middle of the city's Old Town quarter. Many later remodeled burgher houses from the 17th and 18th centuries. An outstanding sacral building is the baroque Church of St Nicolas with numerous side alters and a fine pulpit (18th c.). Old Calvin cemetery tombstones from the 17th and 19th centuries were arranged to form a memorial located next to the Holy Cross Church. Leszno is Poland's most important centre of gliding, ballooning and of model airplanes flying. The Akwawit swimming pool with two water slides (136m and 52m) has become a great city's attraction.