Helsinki Thunder
Finland
Helsinki Thunder was a 3.180 km (1.976 mi) temporary street circuit located in Helsinki, Finland. The circuit was conceived by former racing driver Robert Lappalainen. From 1995 to 1997, it hosted events in the FIA GT Championship, International Formula 3000 Championship and International Touring Car Championship.
Racecourse data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).