Walking across the UK, naked
Steve Gough, a nudist, is walking the length of the UK to promote nudity amongst the Brits who're less likely to bare all than their cousins on the continent. According to this San Francisco Chronicle story:
Gough came to nudity in the past two years, while living near Vancouver, British Columbia, with his girlfriend and their two children. He experimented first at home (in front of his girlfriend's family, no less), then in his courtyard. In time, he grew bolder: "I went to Blockbuster to return a video."