Beachy Head
Move over, Dover: these are perhaps Britain's most spectacular white cliffs. Located 16 miles southeast of Lewes, off the A259 just before Eastbourne, this up-to-530-foot-high curtain of chalk has watched over the English Channel for nigh on 100 million years. You can walk the windy path along the top of Beachy Head for lovely views of the cliffs, the sea, and the red-and-white-striped lighthouse. For a longer clifftop walk, continue west along the Seven Sisters Cliffs; it's around 5½ miles (two hours) each way from the Beachy Head parking lot to the stony beach at Cuckmere Haven.