The Kolezija city swimming pool stands on the site of an older swimming pool complex, built in the 19th century. Being Ljubljana's oldest facility of its kind, it has a long and interesting history behind it and is a place where quite a few residents of Ljubljana learned how to swim.
The present Kolezija includes an Olympic and a children's swimming pool, a paddling pool, a massage pool, and a poolside platform with a wooden grandstand for visitors to lie down. Other facilities include sports and recreation areas intended for playing table tennis, basketball, and beach volleyball.
The swimming pool complex has a parking garage, an outdoor car park, and motorbike and bicycle parking bays. It is accessible to mobility-impaired people.