Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The commemorative stone column conceals a secret laboratory.

The Great Fire of London and the regulation of one-way streets both started in this alley.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Cat art as far as the eye can see.

A stunning example of traditional salt production set against a dramatic volcanic landscape.

Partially collapsed lava tube and cave system complete with concert hall, underground pond, and unique albino crabs.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

This pub built its reputation pouring post-shift pints for employees of the cemetery with which it shares a wall.

A moving memorial to the fallen and missing from WWI trenches.

A monument to the thousands of Canadian soldiers who died capturing the French ridge during World War I.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

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

Natural history museum displaying a famous taxidermied St. Bernard.

A 30-foot-high stream of chocolate flows continuously at the Lindt Home of Chocolate.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

A museum wholly devoted to juvenescence.

This statue commemorates one of medieval England’s most courageous heroes.

Constructed during the 7th century this is one of the oldest largely intact Christian churches in England.