Hello. You have mapped this entire gym as 'Artificial land created for water retention' (basin). I don't know if it was a mistake, but this place corresponds to a gym that has a pool inside. 

Ahoj. Zmapovali ste celú telocvičňu ako "Pozemok umelo vytvorený na zadržiavanie vody" (basin). Neviem, či to bolo omylom, ale toto miesto zodpovedá telocvični, ktorá má vo vnútri bazén.