Musicon is a former industrial site in the city of Roskilde. In collaboration with COWI, GHB Landscape Architects have developed a master plan for the Rabalder Park - a new activity parc close to the city center and with a vibrant urban feel to it.

The layout of the site is based on the request and need for local drainage of rain water, which by reasons of gravity runs to the lowest point of the site, where former gravel pit activities have left deep trenches in the landscape. These are now re-used for infiltration basins with large capacity as well as for recreational purposes with the possibility of many different activities taking place. With an exposure of rainwater in open channels, ​​the water is made an attraction instead of a problem.

The park is built around a main street, Rabalderstræde, where recycled rainwater become a physical useful element and an asset to the street. The street is landscaped as a single, sloping multi-purpose surface which finishes in an elegant staircase element in white concrete that leads to the basins where rainwater is pooled. The street profile is dimensioned so it can handle huge amounts of rainwater that falls now and in the future.