A network of concealed passageways lies within a busy London Underground station.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

Under a church hides a forgotten 13th-century ossuary containing the remains of around 2,500 people.

Decrepit Victorian public lift is a white-knuckle ride.

An eccentric aristocrat brought these Australian natives to their current Scottish home.

This tunnel entrance is built to resemble a grand castle but no one is quite sure why.

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

High-end antique collection housed in a centuries-old church.

The last remaining example of the boatmen's perches that once dotted the south bank of the Thames.

A roadside shrine to a late rock god only remains thanks to the unyielding efforts of his fans.

Three small rooms at the back of the “official” church of London's clowns.

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

This ornate English estates "Prodigy House" still bears the cannonball marks of civil war.

A circle stone within a stone circle.

The majority of the museum's large collection is held in a storage space open to the public a few times a year.

A Neolithic burial site built 1,000 years before Stonehenge.

The last four extravagant street signs of London's historic banking street.

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

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

The breadfruit-adorned final resting place of the infamous Captain of the HMS Bounty.

Hidden on the urban banks of a Manchester river are a series of abandoned waterside industrial sites.

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

These medieval tunnels provided water to the city above through centuries of civil war and plague.

This historic abandoned train station looks like a stop for ghost trains.