Romania's triumphal arch looks out over Bucharest.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This once-derelict building is now one of the most beautiful bookstores in the world.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."

This historic factory peddles classic toys from the picturesque English county of Devon.

The western face was supposedly left clock-less to snub the Welsh.

This enormous spiral sculpture looks strangely out of place on the edge of a housing development.

This medieval manor house was equipped with secret compartments for hiding priests.

This Georgian architectural masterpiece is the only cloth hall left in Britain.

The red letters in the literary pavement leading to the library form a mysterious code.

One of the few surviving street funiculars in the world.

This ruined medieval castle was the scene of Lord Robert Dudley’s seductive reception for Queen Elizabeth I.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

Recently restored menagerie of Victorian-era beasts.

Gutted during the Liverpool Blitz, this architectural husk has been left destroyed in honor of the dead.

This bridge is the first to be made entirely from iron, but designed like it was still made of wood.

The view that inspired the scenes of Dracula's first landing in England.

A museum wholly devoted to juvenescence.

The oldest inn in England served brew to the crusaders.

The highest peak in the United Kingdom has a history of physics, specters, and a pilgrimage of strange objects.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.