Formula 1 has a packed calendar that takes in 24 tracks across 21 countries in five continents, but it takes more than a nice ribbon of tarmac to join the championship.
F1 and the FIA have strict guidelines over what circuits can host a grand prix and they must be classified as Grade 1 to qualify. This is the top level of the FIA's seven-tiered system that covers everything from drag strips to rally stages.
