Parque de Enrique Tierno Galván
Time Out says
Located in the Legazpi neighbourhood, this 45-hectare park began construction in 1986 during the term of Madrid's most beloved mayor, Enrique Tierno Galván. There's a square and statue in honour of him in the park as well. This green space also houses the Madrid Planetarium, an outdoor auditorium and since 2016, an IMAX theatre, where you can see films in 3D. It also has sports facilities and a bike path.