Aerial of the Canal du Midi near Carcassonne, UNESCO World Heritage Site, Aude, Occitania, France, Europe

Cruise liner in lock at Three Gorges Dam, Yangze River, China

Image of aged key in keyhole.

Old key, finca hotel Son Cosmet, Campos, Majorca, Balearic Islands, Spain

Youth breaking-and-entering using a knife to open patio doors

Water coming out of the dam wall, Inguri Dam between Georgia and Abkhazia, Middle East

Landeszeughaus armory Herrengasse Graz capital of Styria Austria gate with wrought-iron fittings

Chinese Cabinet

Woman unlocking car door

Wooden doors