For those who love jumpings in the pool depths, there are some pools and bathing-beaches in Sofia, where you can find those "high towers"...Its safe to do it as there are life-guards who keep an eye on everybody around.
Equipment: You need just your swimming suit and your courage :)
Their's the public place for swimming and sun bathing. It is located in one of the largest parks, surrounded with trees and alleys for walking and bike riding. Nearby are the city stadiums for all kind of different sports if you like bike riding sun bathing sofia is the place for you the city has do a lot of imporvment in building new stadiums and pool since in wont to host the 2014 olimpics games.
their is a lot of big Public pool in sofia so if your feeling a little hot you mite just wont too visit one of the Public public swimming pool in sofia. or you go to sunny beach or nesabur perhaps to see Bulgarias Beautiful black sea coast.
There is a nice pool near to Pancharevo lake. It's about 3-4 kilometers from the end of Sofia between Plana and Lozen mountains
Equipment: you may buy there everything you need. Also the restaurant is good!