One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Famously misunderstood wonder of the ancient world

One of England's most famous churches hides a pair of little known architectural treasures.

This skewed English house has looked like it's going to fall over for centuries.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This silent sentry in the crypt below a large Gothic cathedral is often knee-deep in water.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Used as an example in one of the first dictionary entries for "museum" in 1706.

One of Europe's oldest libraries.

Charles Dickens described the concert room in this amazing Victorian hall as "the most perfect room in the world."

A typographic tribute to the many comedic greats who make Great Britain laugh.

This crumbling industrial fortress has attracted daredevils, filmmakers, and historians.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

A historic Montreal market that was the city's agricultural hub for over century.

The skyline of Montreal includes the silhouette of an unexpected fruit-shaped Canadian staple.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

England's most famous front door has an accidental doppelganger.

Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Its collection includes a broad array of social, geographic, graphic design, and political history.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

A tiny replica of the iconic London landmark hides on the side of the steel structure.