A staggering collection of photographs depicting medical, social, and historical change.

This Transylvanian church has changed its denomination four times.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

New York's oldest magic store.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

A stunning 18th century pharmacy and medieval chemist's collection.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

A medieval church built up to defend its village.

Something's watching you.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

This massive underground salt mine now holds a sci-fi theme park in its depths.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

Once defending the city of New Orleans from invasion by sea, this fort faces an uncertain future.

The crumbling remains of a 19th century fortess.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

The curiosities and wonders of pharmacy in a delightful historic building.

Gilded heaven for philatelists and architecture freaks, still in full working order despite sitting atop tremulous ground.