A nature-packed floating super park has been proposed for cities like New York and London. The Sea Tree would be a multi-tiered structure comprising of layered green habitats especially for wildlife.

Dutch-architects Waterstudio believe they would provide valuable living areas for birds, bees, bats and other small animals. They say new opportunities for extra city parks are rare, so open space such as rivers, seas, lakes and harbours should be utilised. They propose using offshore technology similar to oil rigs to construct the Sea Trees.                      –ON