and then onwards underground to join the Warta. North of old Jeżyce is Sołacz, an area with many large houses and the green areas of Sołacz Park. Smaller neighbourhoods in this area include Niestachów, Urbanowo, Wierzbak (a stream called Wierzbak runs underground here, beneath the street Nad Wierzbakiem – "Over the Wierzbak" – to meet the Bogdanka), and Bonin. North of Sołacz is the area known as Winiary. Historically the villages of Winiary were in the area of today's Cytadela and southern Winogrady in Stare Miasto district (the names Winiary and Winogrady derive from the vine cultivation that formerly occurred there) – in the 1830s, because of the Prussian authorities' plans to build fortifications there, the inhabitants were moved to the area now called Winiary. Between Sołacz and Rusałka lake is the Golęcin area, with the Olimpia complex of sports facilities (including a tennis venue and motorcycle speedway track), and an army training college to the north. North of these areas are the main voivodeship hospital and a Home Ministry hospital, an industrial area, and then the residential districts of Podolany. West of this is the developing neighbourhood of Strzeszyn, and to the north-west the holiday and leisure complex of Strzeszynek next to Strzeszyn Lake. In the north-western corner of Jeżyce is Poznań's largest lake, Jezioro Kierskie (Kiekrz Lake), used especially for sailing. North of the lake is the neighbourhood of Kiekrz (partly forming a village outside the city limits). To the east of Kiekrz is a neighbourhood called Psarskie, and to the south-west, on the western side of the lake, is Wielkie, the site of a former State Agricultural Farm. Other sites of interest in Jeżyce include Poznań's Old Zoo close to the city centre (from which many animals have now been moved to the New Zoo in Nowe Miasto), the tram station on ul. Gajowa, the Church of the Sacred Heart of Jesus and Saint Florian (in old Jeżyce on Koscielna Street), the Wola horse racing track, and the Tor Poznań motor racing track west of the airport. Trams run through old Jeżyce to Ogrody, and through Sołacz to Winiary. The railway line running north-west from central Poznań passes north of old Jeżyce, dividing into two branches – the line to Piła, which has a station called Poznań Streszyn between Podolany and Strzeszyn, and the more westerly line to Szczecin, which has the stations Poznań Wola and Poznań