An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Accessible only at low tide, the deserted island is dotted with World War II ruins.

A 18th century graveyard and its astonishing cortege of macabre iconography.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

This tangled English forest looks like something right out of a fairytale.

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

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The longest hedge maze in the world.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

Northern Ireland's Brobdingnagian stepping stones.

A little slice of Japan and its aesthetics in London's Holland Park.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

A hands-off space for graffiti artists to hone and display their skills.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

One part local history, 99 parts gruesome haunted house.

The world's largest collection of witchcraft regalia.

360° views of the city plus five floors of optical illusions and hands-on science.

The fountain marks the area where hundreds of accused witches were burned at the stake.

A 30-acre garden inspired by the principles of modern physics.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.