First – the two big inner-city green places, Letenské sady and Stromovka. These are both fairly well-know, especially Letenské sady, thanks to its beer garden. To get to the park, you can walk up the steep steps from Čechův most (Tram 12, 17) or go to Sparta or Letenské náměstí (Tram 1, 8, 15, 25, 26) and walk into the park from there. Hradčanská is the closest metro stop and it´s a ten minute walk or one tram stop (to Sparta) from there. Stromovka is a bit more on the wild side, more open space and less paths. You access it across the Vltava via a foot bridge from Troja and the Zoo, or enter near the exhibition grounds of Výstaviště in Prague 7.