The Experience Park -the first built segment of the Ellinikon project, the largest Urban Regeneration project in Europe- hosts in its total 75.000m2 more than 500 trees and 50.000 plants, 4 squares and 4 discrete green areas. The project highlights Reduce-Reuse-Recycle principle through preservation and reinterpretation. The notion of Symbiosis is to satisfy the needs of humans and nature for both to live in equilibrium. It offers a new paradigm of public spaces which represents Sustainability. The past of the site is celebrated, preserved and reintroduced through the lens of a new identity.