The alpine falls where Sherlock Holmes apparently met his demise can actually be visited.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

This prison on the Maltese island of Gozo is almost 500 years old, and they have the graffiti to prove it.

Ancient mysterious ruts carved in the bedrock.

Holy Grotto of Montserrat Monastery holds one of Europe's mysterious black Madonnas.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A local prank turned town icon.

The Home and murder site of the witch of Rehmeyers Hollow.

The slate extracted from these Pennsylvania quarries was once hailed as the finest in the world.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

An outlandish shoe shaped house built by an eccentric millionaire.

North America’s largest collection of horological devices and home to a colossal clock with a dizzying array of features.

The oldest farmer's market in America is so ancient it was approved by the King of England.

Yo, Adrian!

Dr Barnes' $25 billion private collection of art and arboretum.

This elaborate towering structure was once famed for its revolutionary height.

An out-of-place slice of France, smack in the middle of Shanghai.

An collection of Chinese propaganda posters from 1949 to 1979.