It covers 80 hectares of contaminated former industrial land between the River Derwent and railway lines, and was developed between the 1990s and early 2000s.
It was the original site of Derby's railway manufacturing industry, but land here had also been used for gas- and coke works, gravel abstraction and landfill.
These uses left behind large amounts of industrial contaminants, including tars, phenols, heavy metals, ammonia and boron.
Extensive redevelopment took place over 10 years to reclaim the brownfield site, including the building of a new access road to open the area up.
Ten hectares of the site was transformed into a Local Nature Reserve called The Sanctuary, in conjunction with Derby City Council.