Lake Naplás (Naplás-tó, officially called the Szilas-pataki flood control reservoir) has always been an attraction for nature lovers. The lake and the land that surrounds it are home to an incredible variety of flora and fauna. Here, the grass isn't tended, but this is a slice of pure nature. The area, protected since 1997, is the natural habitat of a great number of protected species of plants that turn the fields into an astonishing cascade of colours in spring. Bring wellington boots because the area is mostly swampy.
Tip: A cycle path was created in 2015, so you can ride all the way to the lake along the stream of Szilas-patak. There are also plenty of playgrounds and bird-watching spots en route at Hermina út and Zugló-patak.