Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.

This historic structure has been used as a mosque, a barracks, a prison, a school, and a bakery.

The ruined doorway is a portal to the building's turbulent and torturous past.

An ancient octagonal weather station named for the eight Greek gods of wind.

The Cycladic architecture makes this Athens neighborhood feel like an island paradise hidden in the shadow of the Acropolis.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The last masonry skyscraper ever built reveals a transitional moment in architectural history.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

An 11th-century runestone decorates the halls of Terminal 2 of this Scandinavian travel hub.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

This stone amphitheater was once part of Nazi Germany's plan to promote propaganda.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

It's good luck to be mocked by this monkey.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Pulled from the rubble of one of the worst modern tragedies, a steel crossbeam became a symbol of hope for New Yorkers.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

Salute the leader of the proletariat.

Avoid gangster interaction while window-shopping.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.