Time Out says
A little-known corner of the city that only locals know, Savica is a series of lakes south-east of the centre, tucked in from the river. There are 12 lakes in all, some up to eight metres in depth, and are mainly the domain of the Pešćenica fishing fraternity.
But it’s not all about rods and reels. In 1991, Savica was declared a Significant Area with a Special Zoological Reserve, meaning that protecting the wildlife here is enshrined in law. The ornithological station here is the only one in Zagreb, and attracts group of schoolchildren who come here for study workshops.
Ringing and migration patterns are showcased but the lay visitor can enjoy the simple pleasures of watching the swans and various wading birds go about their business with little disturbance.
Bus No.218 runs to Savica every 50 minutes from the main train station.