Here's my calendar using 1960s cars, and imagining that the drivers will be totally safe from injury or death. I know most of the races are in Europe but that is where most of the best tracks are.
1. Albert Park, Australia. Not among the best tracks on the calendar but it is better than average, and for me the season starts with waking up in the early hours for the first Grand Prix in Australia.
2. Sepang, Malaysia. Disappeared from the calendar in 2017 but tends to provide exciting racing and can also provide changeable weather conditions. Much-missed from the calendar.
3. Kyalami, South Africa. An exciting, high-speed track in a continent that doesn't currently have a race track. The backdrop of the track is also somewhat unique.
4. Donington, UK / Portimao, Portugal / Reims-Gueux, France (on rotation). This is a cheat way of sneaking in more good tracks. Donington has only hosted one GP but it was a classic, and the Craner Curves and the Old Hairpin are a cracking sequence of corners, Portimao was the best new edition to the 2020 calendar and provides great side-by-side racing, and there's just something beautiful about Reims.
5. Bremgarten, Switzerland. Disappeared following Switzerland's ban on motorsport after the Le Mans disaster, but was a great high-speed track with some heavy braking zones as well.
6. Monaco. Undroppable, for its history and the skill required to drive it, despite the processional races, and overtaking was far easier in smaller cars.
7. Montreal, Canada. Another track that tends to provide interesting races, and the race here in 2011 was the greatest of all time.
8. Silverstone, UK. A good high-speed track that also allows cars to run side-by-side for much of the lap, and so there can be some great battles here.
9. Red Bull Ring, Austria / Osterreichring, Austria. While the Osterreichring is an amazing high-speed track, there are quite a few of those on this calendar and the shorter Red Bull Ring is particularly good for side-by-side racing, so I have decided to alternate between the two layouts.
10. Rouen-Les-Essarts, France / Clermont-Ferrand, France. Two very similar tracks, which are great to watch the cars on, and are in great locations.
11. Hockenheim, Germany. Another good track which usually provides exciting races and is much-missed from the calendar.
12. Hungaroring, Hungary. Doesn't always provide good racing but for some reason there have been quite a few crazy races there. It probably would have better racing in the old cars, and there are some interesting corner sequences.
13. Spa-Francorchamps, Belgium. This is a track that is brilliant despite being shortened from the original layout, and I would alternate between the layouts.
14. Monza, Italy. But the version of this track without the chicanes for some unique slipstreaming races.
15. Brands Hatch, UK. Another beautiful track with some great corner sequences that would be much better for old cars than the current ones.
16. Zandvoort, Netherlands. A welcome return to the 2021 calendar, and the banked corners are particularly exciting.
17. Nordschleife, Germany. If only it wasn't so dangerous. This track reminds be of a rally track more than an F1 track and, to watch a qualifying lap, would be the best in the world to watch the cars. It couldn't not be on this calendar.
18. Watkins Glen, USA. It is a shame that the increase in American circuits has resulted in more street circuits rather than classics like Watkins Glen.
19. Suzuka, Japan. Has provided some great title deciders in the past and is also one of the best on the current calendar to watch a qualifying lap, while in older, smaller cars the races would also be more exciting.
20. Interlagos, Brazil. Alternating between the layouts. I like this track to be the title decider even though it was among the early races for a long time, but on the current calendar it is probably the most likely to provide an exciting races, and the weather can often play a part as well.