Paul Hanna / Reuters
Cyclists ride nude through central Madrid during the nude cyclist protest against the dangers commuter cyclists face, in conjunction with the World Naked Bike Ride on June 9, 2012. The protest calls on authorities to provide safer cycling routes and for drivers to respect cyclists.
Karel Prinsloo / EPA
A man waits for the start of the World Naked Bike Ride in London on Saturday.
Concierge.com’s Danielle Pergament reports:
Ostensibly, the World Naked Bike Ride was started in 2004 as a demonstration against pollution and oil dependency. Over the years, it's taken on different forms in different countries at different times but the general theme is the same: Participants are encouraged to strip down and go out for a bike ride, but the bicycle part is somewhat misleading—skateboards and in-line skates are welcome as well.
See the World Naked Bike Ride website for more details.