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

The world's largest wooden structure.

The final resting place of the great navigator, or maybe his brother.

Every spring, locals see the shadowy figures of a ghost army of slain Greek soldiers descend upon this ruined fort.

Climb inside an iron crystal magnified 165 billion times its normal size.

A little sculpture with a large wardrobe.

Once a black market electronics marketplace, now an otaku shopper's paradise.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

This Japanese national treasure was originally built in 593.

The quintessential Japanese rock garden has existed for more than 500 years.

The 10,000 Torii shrine.

This massive wooden building contains a giant Buddha, healing pillars, and tame deer wandering the grounds.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

A marvel of Byzantine engineering under the streets of Istanbul.

Charnel house at the foot of Mount Sinai.

The deadliest diving spot in the world is also a stunning geological marvel.

An alien landscape of chalk-rock in the Egyptian desert.

Ozymandias’ time-keeping temple.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Just a few miles off the western coast of Ireland lies an isle steeped in Irish literary history.

The ancient tomb acts as a calendar that keeps perfect time.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.