Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

This enormous secondhand bookstore inside a Victorian train station sparked the "Keep Calm and Carry On" craze.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

Scotland's only funicular railway is also the United Kingdom's highest.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

It's believed King John of England stayed at this 13th-century castle before riding off to sign the Magna Carta.

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

This ruin in a suburban park may be the place where Shakespeare's "A Midsummer Night's Dream" was first performed.

This hospital once pioneered the use of electroencephalograms, but fell into maltreatment, abuse, and eventual abandonment.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

These tenacious 14th-century towers defied demolition and are now a fairytale vacation rental.

One of two Irish-style round towers in Scotland, this structure has mysterious origins.

These imposing walls and towers look more like the ruins of a fortress than a monastery.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

A hidden tunnel leads to a medieval queen's shrine buried beneath a parking lot.

The bizarre headgear looks like it was made for a fool, not a king.

This 1,300-year-old marker is one of the finest and most complete early Christian crosses in Scotland.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

A 200-year-old prison that now houses a peculiar crime museum.

The only medieval bridge in Britain with its defensive tower still in tact.

One of the few surviving street funiculars in the world.

Where, exactly, the great aviator completed her transatlantic flight has caused some trouble in Wales.