When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

A park where the Inn and Ilz rivers join the Danube as it slinks off into Austria.

Shimmering sea-colored mosaics and Jesus statues cover this opulent building.

The site where two doves fell in love.

A 16th-century fountain marks the site of a lost medieval cemetery once filled with mass graves.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

The narrowest street in Paris.

This 400-year-old tree is actually an immigrant from North America.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

Lady Liberty's original designer installed a little clone in this French fountain.

This Bordeaux parking garage has 712 indoor spaces, and one outdoor.

This modern district offers a stark contrast to Bordeaux's terrace-lined squares and waterfront façades.

The world's largest reflecting pool is just two centimeters deep.

The location of this small park was once the site of an infamous public morgue.

Marie Antoinette and Napoleon Bonaparte were fans of this 200-year-old French chocolatier.

Walk upon the mementos of the dead in this Parisian courtyard paved with medieval tombstones.

An ancient healing font dedicated to an 11th-century matriarch was moved to make way for progress.

The oldest building in Charleston was used to store gunpowder during the American Revolution.

A striking steel sculpture that was moved to an out-of-the-way location.

Spitfire airplanes with butterfly wings hover over Prague’s skyline.

The biggest bit of tackle you’ll ever see is in this Alberta town.

Historic site that showcases the history of British Columbia's fishing industry.