Dunwich Dyanamo

Someday I'd love to do the Dunwich Dynamo. It's a night ride from London to the sea. People turn up at a pub in Hackney on a Saturday near the full moon in July. They ride out of London, into the countryside, and 120 miles later arrive at the beach in Dunwich, where they eat breakfast and have a nap. There's a radio documentary about the ride here. Worth a listen.