The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The world-record holder for the longest bridge stretching continuously over water.

The permanent home of a 1960s traveling museum of tiny historical dioramas.

One of Cincinnati's greatest fighters once trained at a now defunct gym in this Over-The-Rhine neighborhood.

An obsolete, vanishing traffic device warns Cincinnati drivers away from middle-of-the-road obstructions.

An art deco ice cream shop covered in vintage tiles.

Formerly known as National D-Day Museum, this collection commemorates the battles of Normandy and WWII.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

A bizarre roadside attraction and the first instance of miniature golf in the world.

This former sugarcane transport tunnel is now a portal to a lovely beach.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

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

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the first ‘Harry Potter’ film.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Pilgrimage site for star-crossed lovers.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

The curious underground history of keeping Paris clean.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.