This metal tower in the desert provides views of a handful of Nazca geoglyphs.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

These steeply terraced ruins are a stop along the Inca Trail to Machu Picchu.

These giant mummies are set ominously into a Peruvian cliffside and topped with real human skulls.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

One of the world's tallest waterfalls wasn't revealed to the world at large until 2006.

A set of ancient drawings in the desert of Peru that are so massive, many of them can only be fully seen from the sky.

This scalding hot river was thought to be a myth until one geoscientist made it his quest to study the mystical waters.

The mortal remains of an estimated 70,000 people lie in the basement of a monastery in Lima, Peru.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

An angelic, yet demonic-looking figurine presides over one of Glasgow's most ancient streets.

A 200-year-old collection of oddities and medical paraphernalia.

A red sandstone freestanding monolith rises out of the sea in northern Scotland.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

The 18th-century inspiration behind Harry Potter's Sorting Hat.

A re-purposed wooden sculpture, depicting one of Scotland's most beloved writer's amphibious creations.

The fictional birthplace of the Chief Engineer aboard the Starship Enterprise.

If you fly into Edinburgh Airport, it's possible to spot this prehistoric site without even getting off the plane.

The largest terracotta fountain in the world, built to commemorate Britain’s Victorian achievements.