Monaco
Elevation change: 42m
It may be short, but Monaco squeezes a lot of elevation changes into its 3.3km – not least at the start of the lap where the drivers climb what must feel like the side of a mountain from Ste Devote (Turn 1) all the way to the high point of Casino Square (Turn 4). If they could see over the barriers on their way up, they’d be able to spot the low point, which comes just before La Rascasse (Turn 17). Bizarrely, despite being on the harbour side, the lowest point is still technically 47.5m above sea level because in this instance ‘sea level’ refers to the average height of the earth’s oceans.