Natural bridges are rock formations shaped by geological activity over millions of years. Let's take a look at some of these stunning natural structures. Pont d'Arc, FranceA popular tourist attraction ...

This article is part of "Solutionaries," our continuing commitment to solutions journalism, highlighting the creative people in communities working to make the world a better place, one solution at a ...

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 ...