Grand Canyon National Park, Arizona
Abandoned building in Vallone dei Mulini near Sorrento, Italy
by gute-ute on Flickr.Wooden walkways in Liechtensteinklamm, 50km south of Salzburg, Austria.
Grand Staircase-Escalante National Monument, Utah
Bryce Canyon National Park, Utah
by johnny_clash55 on Flickr.Puente Viejo in the city of Ronda – province of Malaga, Spain.