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09/09/2010 08:01 am ET Updated May 25, 2011

Crazy And Useful Bike Contraptions: Weird Bicycles (PHOTOS)

Interest in bikes as a sustainable and fun way to get around town has skyrocketed in recent years, but bicycle enthusiasts have been getting creative with their creations for years.

At fairs and festivals around the country, those handy with a welding torch show off their unique constructions. In bike-friendly cities like San Francisco, Boulder, and Austin, you'll find tall, long, and just plain weird bikes locked up in front of the coffee shops.

This slideshow is just a taste of all the great stuff out there, so send us your craziest and most useful bike contraptions!