Rainbow Natural Bridge surrounded by red rock landscape in Utah - Stephen Moehle/Shutterstock When you see a natural bridge, it's almost hard to believe that it wasn't secretly human-made. Seemingly ...

(CNN) Don't try to drive over these bridges. These rocky natural spans were formed over millennia by the flowing waters of a stream or other water source, which slowly eroded away the rock to create ...

PINE, AZ — Located near Payson, you’ll find Tonto Natural Bridge State Park, home to the world’s largest natural travertine bridge. “Number one, you won't find a bridge like this anywhere else in the ...

When you see a natural bridge, it's almost hard to believe that it wasn't secretly human-made. Seemingly sculpted from canyons and made of long, slender rock suspended over space, natural bridges are ...