A 16th-century Andalusian palace.

Its appearance in "Game of Thrones" may spur on the long-awaited restoration of this medieval shipyard.

The world's largest wooden structure.

Celebrating the history of Hangul, the Korean writing system invented by King Sejong to improve his realm’s literacy.

The site where the Emperor of Korea performed the long-forbidden "rite of heaven" to demonstrate his absolute sovereignty.

The world's longest bridge fountain has hundreds of nozzles that create a beautiful, illuminated spectacle.

A symbol of hope, survival, and national character, especially after it rose phoenix like from the flames.

A park where people have been going to feed friendly pigeons since the 18th century

This colorful gate stands as an entrance to the walled city of Old San Juan.

Inside this faux cave, visitors can learn how some of their favorite fantasy characters were created.

Ella Fitzgerald, opera singer Enrico Caruso, and dancer Isadora Duncan all performed in this lavish, supposedly haunted theater.

The only example of a Paris Métro sign in use at a subway station outside of the French capital. 

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

This urban oasis is a marvelous meld of music and landscape architecture.

A memorial to the tens of thousands of Irish who fled to North America during the Great Famine.

Niagara Falls holds a special place in Nikola Tesla's history, so they put a statue on it.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

Amsterdam's Red Light District leaves little to the imagination.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

It's just another skyscraper, but it's shaped like '90s cell phone.

The largest cemetery in Chile is the final resting place for more than 2 million people, from politicians to artists.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.