The final resting place of the liberator of Argentina is guarded around the clock by two soldiers.

These small sculptures pay homage to the lovable star of an iconic Argentine comic strip.

The narrowest house in Buenos Aires is less than 10 feet wide.

Museum housed in underground tunnels that date back to Buenos Aires's earliest settlements.

A bright little alley in La Boca is a part of tango history.

Buenos Aires' city of the dead contains some very famous remains, including Eva Perón.

This historic, palatial theater is now one of the world’s most beautiful bookstores.

Three hundred years of preserved Spanish colonial history in San Antonio.

The world's brightest bioluminescent bay.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This beach pool offers a spectacle of crashing waves, blue hues, and a historical lighthouse.

The world's second largest single-dish radio telescope, once used to contact E.T.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The site of the climactic scene from the classic horror film is now a historic landmark.

Parking garage where Bob Woodward met Watergate source "Deep Throat."

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

The prototype for all Nazi concentration camps.

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.