Chilterns association used Mile End Park in London's East End to demonstrate what could be achieved by urban regeneration during the recent presidential visit.
President Joe Dwyer, a keen advocate of urban regeneration, saw how 90ha of segmented and under-used open space has been transformed into an active and vibrant regional park.
The lynchpin of the new park is a 25m wide 'green bridge', which supports mature trees, cycle and pedestrian paths, and effectively links the two halves of the park for the first time.
The bridge demonstrates sustainability through ground level shops and cafes in the abutments, which as well as keeping the street alive, will generate income to finance park rangers.
Buildings in the park - to be used for teaching ecology and holding art exhibitions - are also ecologically sustainable.
Low energy costs were ensured by building them into the ground.
The only downside is that the park is contributing to the increase in house prices, so that the 37% youth population of the local community may not be able to afford to continue to live in the area.