The world's largest collection of witchcraft regalia.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

These engineering masterpieces are a dominant feature of the Belfast skyline.

This hidden museum examines the complex history of the country's law enforcement.

It was once nicknamed "the most bombed hotel in Europe."

The last Victorian market in Belfast.

For part of the year, this innovative greenhouse is painted white to keep the plants from getting scorched.

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

This pedestrian walkway cuts through a cemetery and over several burial vaults.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

This well-preserved Cistercian Abbey in a romantic pastoral setting has inspired artists like the poet Wordsworth.

A miniature Italianate fantasy village on the coast of Wales and the set of ITC classic "The Prisoner."

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

One of Ireland's most infamous prisons for rebels including men, women and children.

The unusual clock on this 18th-century market building has an extra minute hand for "Bristol time."

A quaint hamlet of nine cottages around a small green near Blaise castle.

A historic, reportedly haunted pub that provided inspiration for several famous adventure novels.

There's a labyrinth of manmade tunnels stretching for over an acre beneath Bristol.

The Bristol Camera Obscura housed in an ancient windmill.

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

An early 20th-century bullring converted into a modern shopping center.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.