This Peruvian canyon is filled with geometric salt pools that have been being harvested since the Incan empire.

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.

Huge stone depressions which may have acted as an Incan agricultural experiment.

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

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.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

Every equinox this Maya pyramid puts on a spooky ancient light show.

This portion of a lovely Belize beach is infested with (harmless) sharks and rays.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

The most loyal of little dogs, or a Victorian era publicity stunt?

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

This obscure walkway links Edinburgh’s Old Town with one of the city's prime vantage points.

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

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

This tiny watering hole claims to have the smallest bar counter in Europe.

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

Two plaques commemorate the site of Shakespeare's first theatre.

This pub was 238 years old when it decided to revamp its image: It started serving Thai food.

The London pub overlooks where the Mayflower was moored before setting sail for the New World.

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