NB: Uses data from 2013! So you know maybe don't trust all the things. The stages are pretty safe though.
A RESTful geolocation data source for Roskilde Festival
GET /categories.json
GET /categories/0.json
GET /categories/0/locations.json
GET /categories/0/locations/0.json
GET /locations.json
GET /locations/0.json
Made for you by Roskilde Labs.