Zion Photo:  The Worlds Longest Arch, Kolob Arch in Zion National Park.

Kolob Arch is known to have the longest span of all the freestanding arches in the world and is often referenced
as the worlds largest arch. Kolob Arch is natural bridge formed when water eroded the rock, creating the present
formation. Kolob Arch measures 294'. Until recent recalculations (2005), this arch came in second after Landscape Arch.