Gorges de l'Areuse, Switzerland The Val de Travers is a Jura mountain valley perpendicular to the main valleys (hence the name). The river Areuse has cut itself steeply through the soft limestone and clay sediments. It's one of those Roman bridges too.
Niagara Falls is a sight to see, but located south of Seneca Lake in the Finger Lakes region lies a lesser-known fantasy-like area called Rainbow Bridge and Falls in Watkins Glen State Park, New York. Maybe on Montreal trip?
Scratch-Off The World. Scratch off a place whenever you visit it, or use this as a teaching tool. Whenever you teach the students about a place, scratch it off! This could also be used to teach students the locations of different places in the world.