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

In an arboretum with hundreds of memorials to the fallen, this one might be the most poignant.

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

This poignant WWI memorial looks like a lighthouse 100 miles from the sea.

The largest cave chamber in Britain—big enough to fit a whole cathedral inside.

The site of the climactic scene from the classic horror film is now a historic landmark.

The world's largest collection of witchcraft regalia.

A Scottish manor with a history of mysterious fires, magic, and eccentric tales

Where Aleister Crowley attempted to seize the Hermetic Order of the Golden Dawn in a mask and a kilt.

Super Robot anime statue guards a forgotten suburban development in Tarragona.

This whimsical winery by Antoni Gaudí looks ripped from the pages of a fairytale.

A Spanish forest is filled with mysterious stone carvings.

A gravity-defying "devil's bridge" that has a surprising architectural feature for its stability.

This semi-secret storybook hedge maze is also the oldest garden in the city.

This cemetery features modernist statues as strange as its name.

A beautiful but toxic fountain of mercury.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A stately palace has been converted into the world's largest cannabis museum.

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

Europe's largest prehistoric mound – burial site of a legendary king?

The largest stone circle in the world has ended up bringing up more questions than it has answered.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.