New concept of sustainable public space. Large ground floor and car park in the basement (8000m²) in Barcelona, designed entirely with LED lighting to minimise maintenance costs. The proposal establishes a string of chained green slopes that structure and link the space, eliminating unevenness and architectural barriers. Behind these slopes there are playgrounds, a parking ramp, access to driveways, a dog exercise area, access roads and leisure areas. The elevated slopes and vertical gardening walls camouflage the location of the underground car park.