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

These relics of the city's past now exist as a prominent modern feature.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Op-art architecture designed for happiness.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

A crumbling cathedral condemned by an earthquake.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Cuba's historical trains remind natives of their country's sugary sweet past.

After the Cuban Revolution, the famous rum company had to leave their swanky headquarters behind.

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.

Castro's communist ice cream mothership has been serving five-scoop "salads" for over 50 years.

This French colonial post office is arguably the grandest in all of Southeast Asia.

Ho Chi Minh's perfectly preserved body has been on display here since 1975.

Twice a day a speeding train passes only inches from the homes of this residential neighborhood.

Bangkok celebrated its shifting monarchy with a militaristic homage to democracy.

This dazzling Buddhist temple was constructed from over one million ceramic tiles salvaged from a British shipwreck.

A condom-covered Thai restaurant that is more concerned with birth control than food.

Only through deep darkness and tragedy did this elaborate royal palace become a sacred temple.

Enormous pendulum helps keep Taiwan's tallest building from swaying.

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

Secret North Korean passage discovered below the world's most dangerous border.

Watch butterflies take flight before you fly.