Seaford to Eastbourne
Best for: dramatic coastal views and killer calves
The rollercoaster of coastal trails, this route takes you up and over (and up and over again, and again) the chalky white cliffs of the Seven Sisters to the seaside resort of Eastbourne. En route, pass through Cuckmere Haven, hunt for fossils at the Birling Gap (it can get a little busy here in warmer climes, but the National Trust shop and café are great for a loo break and refuel) and stop for a photo-op of the candy-striped lighthouse at Beachy Head. For a longer, all-day trek, try the route in reverse and follow the coast to Brighton.
How to get there: Catch the trains from London Victoria to Brighton and then on to Seaford, about 90 minutes. The direct return train journey from Eastbourne to London Victoria takes roughly the same time.