World Naked Bike Ride Day is returning to Buffaloand yes, there really will be partially clothed and totally naked people riding bicycles through the streets of Upstate New York's largest city.
The event is more popular than you might think. Hundreds of rider will show up "bare as they dare" to take to the streets. And you can bet on plenty of spectators.
But the event is more than just a spectacle. Some of the images below contain nudity and are not safe for work.
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First of all, it's not just one day. Cities around the world have Naked Bike Ride Day on different days every year.
Other than that, it's exactly what it sounds like. People take as many clothes off as they are comfortable with, hop on a bike or a nude suite or in some roller-skates and ride through the city streets.