Catalunya
The Spanish circuit of Catalunya, near Barcelona, is a real humdinger. It's got the infrastructure and facilities to host everything from Formula One and MotoGP down, and the track itself is long (2.87-miles), wide, and packed with corners. There are 16 turns in all, including the super-long right-hand turn 3 that scribes a massive horseshoe in the Montmeló hills. The main straight is enormously long, and is the scene of much 200 mph slipstreaming during MotoGP rounds.
Kyalami
Currently a WSB circuit, Kyalami in South Africa has also hosted MotoGP and Formula One races in the past. Built in 1961, the circuit's main feature is its extreme altitude: it's nearly 5,000 feet above sea level, which effectively chops almost ten percent off the power of a bike's engine.
That aside, the 2.6-mile track is fast, flowing, and its 13 turns cover all the bases-from hairpins to fast sweepers. It's full of altitude changes and isn't perhaps the safest track on the calendar: Regis Laconi suffered a broken back at the race there this year after a high-speed spill.
The track is lined with traditional local buildings, called "bromas," with quaint thatched roofs that serve as hospitality rooms.