Despite being relatively unknown, Ahvenisto is one of the most challenging circuits in Finland. Many would suggest it's one of the most challenging in the world. Few run-off areas, steep elevation changes and some ridiculously fast bends means this circuit would be a test for anyone
Perhaps the most surreal racing destination in the world, the Norisring in Nuremberg is part of the site the Nazi Party used as a staging ground. The first race around the Norisring came in 1947 and is now used as a circuit for DTM and F3. Wide straights leading to narrow hairpins, there's always action aplenty.
8) OULTON PARK
Situated in Chesire, England. Oulton Park is one of Britain's best circuits that has never hosted an F1 Grand Prix. The circuit is well known for its many tight corners and blind crests. Oulton Park is currently home to many British racing events, including: British F3 and the British Touring Car Championship.
7) DAYTONA INTERNATIONAL SPEEDWAY
Daytona has quite recently undergone a $400m development which included creating an extra 100,000 seats, hence why some are referring to it as "the first motorsports stadium". Whilst the circuit is best known for oval racing, the road course used for endurance racing is a thrilling mix of top speeds and slow corners.
The Algarve International Circuit isn't even 10 years old, but already hosts a large number of events on the racing calendar. The circuit regularly hosts endurance racing and has also been a destination for F2 (formerly GP2) and F1 testing. Talks of a Grand Prix heading to Portugal again have circulated but haven't materialised as of yet.
5) ROAD AMERICA
Situated in Wisconsin, Road America remains one of most difficult circuits to master in North America. The circuit has it all really: it's very fast, is a favourite amongst fans and drivers and the place itself is absolutely stunning. It's no surprise that the circuit has returned to the Indycar schedule
Monaco. On. Steroids. Not many places make Monaco look tame, but Macau is one of them. The Macau Grand Prix is one of the most prestigious races for young stars and names such as Ayrton Senna and Michael Schumacher have won there. Fast straights and uncompromising crash barriers mean this one is a real test.
3) CIRCUIT DE LA SARTHE
The world famous home of the 24 hours of Le Mans. The circuit is tough on the driver but also the car as a large amount of the lap is spent on the throttle. This puts a lot of stress on the engine but also on the brakes as harsh corners force the car to slow rapidly. This makes it incredibly challenging, especially for endurance racing.
2) LAGUNA SECA
Just imagining cars storming down the corkscrew turn is enough to want to see Formula 1 action at the circuit. Whilst turns 8 and 8a are rightfully well known, this circuit is far from a one trick pony. The track flows beautifully and the 180m elevation change gives the driver something else to think about.
1) MOUNT PANORAMA
Mount Panorama Circuit in Bathurst, Australia is a breathtaking racing circuit and one that is unlike any other in the world. The climb up and down the mountain is something to behold and corners such as Hell Corner and The Chase live up to their names. Just watch the video of Jenson Button in his McLaren. It's beautiful to watch.