The ornate structure is part of a building boasting more marble than the Vatican.

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

The taxidermied remains of a once-great parrot.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

A mysterious bridge over a sunken Roman road.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

A relic of Victorian grandeur hides beneath a busy South London road.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A petite castle folly in the English countryside.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

The strange behavior of a tween led to allegations of witchcraft and a curse being placed on anybody within earshot.

This Scottish museum is the only one in the world to focus not on one religion but all of them.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

A library where thousands of books explain how to avoid another Great Recession.

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

A village on the east coast of England that has almost completely eroded into the North Sea.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Human-made caves excavated to hide a secret society of wealthy pagans.

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