This elegant Colombian fortress was one of the torture headquarters for the Spanish Inquisition.

World's largest film studio, where visitors tour the decaying sets that litter the harsh desert environment.

A Moroccan getaway in the mountain range that plays the Himalayas' stunt double.

During the holidays, a vintage subway train whisks New Yorkers back in time.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Disney's abandoned animal island is now an overgrown ruin that was almost the coolest attraction ever.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

An indigenous take on European design creates a stunning visual overload.

The only castle in North America to ever house European sovereigns.

A 500-year-old series of tunnels long believed to be folkloric was uncovered beneath the streets of Puebla.

An Aztec temple, the largest man-made pyramid in the world, sits buried in earth with a Spanish church set on top.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Part bookstore, part café, and part forest.

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 is not only one of the oldest collections in Europe, but also possibly the most beautiful.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Hundreds of hidden passageways weave through the old quarters of Lyon.