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

Single runway interrupted by a busy road that cuts across its middle.

Breathtaking and huge 430 year old maps of Italy.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

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

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The oldest colonial fortress in the Americas was once the home and later prison of Christopher Columbus.

Built in 1512, the oldest cathedral in the Americas.

Largest pre-Lent festival in the Dominican Republic.

Collection of fossils, plants, and ancient animals encased in amber.

The first hospital in the New World.

After Christopher Columbus died, his son built a fancy house to rule from.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

Frida Kahlo's childhood home, now a museum of her life and works.

What happens here stays here – unless it affects the whole world.

The most confusing clock in New York.

There must be a pun in this haystack somewhere...

A bit of retro transportation flair preserved in the world's largest department store.

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.