The Circuit Bremgarten was a 7.28 km (4.524-mi) motorsport race track in Bern, Switzerlandwhich formerly
The Circuit Bremgarten was a 7.28 km (4.524-mi) motorsport race track in Bern, Switzerlandwhich formerly hosted the Formula One Swiss Grand Prix and the Swiss motorcycle Grand Prix.
Bremgarten was built as a motorcycle racing track in 1931 in the Bremgartenwald (Bremgarten forest) in the north of Bern. The circuit itself had no true straight, instead being a collection of high-speed corners. It hosted its first automobile race in 1934, which claimed the life of driver Hugh Hamilton. In 1948 it claimed the life of Italian racer Achille Varzi. From the outset, Bremgarten's tree-lined roads, often poor light conditions and changes in road surface made for what was acknowledged to be a very dangerous circuit, especially in the wet.
Source: Wikipedia