Every year, over 25,000 monarchs overwinter in Pacific Grove.

The oldest cemetery in New Orleans, resting peacefully for over 200 years now.

Medicinal spa created with the discharge from a geothermal energy plant.

Most-visited and most-photographed slot canyon in the American Southwest.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

A restaurant and observation deck built in a unique broadcasting antenna.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

Mountain where Jesus was first tempted by the Devil.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

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

One part local history, 99 parts gruesome haunted house.

Stonehenge has nothing on Castlerigg’s views.

The sign at the garden gate reads: "These Plants Can Kill."

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

This iconic 1,000-year-old medieval castle is a favorite of the film industry, most notably as the location for Hogwarts in Harry Potter.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

Largest lake in Great Britain measured by surface area.

America's Most Wanted's set resides in this tribute to the history of crime and punishment.

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