Spurn is a narrow, three-mile spit of sand and shingle curling across the mouth of the Humber from the East Riding coast. It is constantly reshaped by the sea, and since a storm in 2013 it has been cut off from the mainland at high tide. The Yorkshire Wildlife Trust looks after it as a nature reserve.
It is one of the best places in Britain to watch bird migration in spring and autumn. At the tip stands the black-and-white lighthouse of 1895, which you can climb, and the remains of old military defences. The reserve's discovery centre is at Kilnsea. Check the tide times before walking out.