Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

An abandoned Nazi explosives plant founded by the inventor of dynamite is now an underground museum.

A crumbling island fortress that seems to be covered in a field of stone crosses but is simply incomplete.

A French library that makes sure its love of books is writ large... giant in fact.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

This picturesque Umbrian city has a subterranean side that has long remained hidden.