by buildings of flats and is an odd result of human intervention and nature taking its course. The area was a small village that Ceaușescu attempted to convert into a lake. After demolishing the houses and building the concrete basin, the plan was abandoned following the 1989 revolution. For nearly two decades, the area shifted from being an abandoned green space where children could play and sunbathe, to being contested by previous owners of the land there, to being closed for redevelopment into a sports centre. The redevelopment deal failed, and over the following years, the green space grew into a unique habitat. In May 2016, the lake was declared a national park, the Văcărești Nature Park. Dubbed the 'Delta of Bucharest', the area is protected. Bucharest is situated in the center of the Romanian Plain, in an area once covered by the Vlăsiei Forest, which after it was cleared, gave way for a fertile flatland. As with many cities, Bucharest is traditionally considered to be built upon seven hills, similar to the seven hills of Rome. Bucharest's seven hills are: Mihai Vodă, Dealul Mitropoliei, Radu Vodă, Cotroceni, Dealul Spirii, Văcărești, and Sfântu Gheorghe Nou. The city has an area of . The altitude varies from at the Dâmbovița bridge in Cățelu, southeastern Bucharest and at the Militari church. The city has a roughly round shape, with the centre situated in the cross-way of the main north–south/east-west axes at University Square. The milestone for Romania's Kilometre Zero is placed just south of University Square in front of the New St. George Church (Sfântul Gheorghe Nou) at St. George Square (Piața Sfântul Gheorghe). Bucharest's radius, from University Square to the city limits in all directions, varies from . Until recently, the regions surrounding Bucharest were largely rural, but after 1989, suburbs started to be built around Bucharest, in the surrounding Ilfov County. Further urban consolidation is expected to take place in the late 2010s, when the 'Bucharest Metropolitan Area' plan will become operational, incorporating additional communes and cities from the Ilfov and other neighbouring counties. Climate Bucharest has a humid continental climate (Dfa/Dfb by the 0 °C isotherm), or a humid subtropical climate (Köppen: Cfa by the -3 °C isotherm), with hot, humid summers and cold, snowy winters. Owing to its position on the Romanian Plain, the city's winters can get windy, though some of the winds are mitigated due to