Musselman Arch, in Canyonlands National Park, UT. While technically it's a bridge (and was known as "Little Bridge" in the past), its popular name today is after a local resident well-known for exploring the region around the bridge. It's five feet thick, six feet wide, 187 feet long (as measured on Google Earth®)--and 300 feet down! There are rumors that bicycle riders into the Canyonlands sometimes enjoy a brief jaunt across this fantastic formation. I was satisfied just to walk across it. Imaged in April 09 using a 10-mm lens (and 1.6X sensor multiplication factor).