This small, but beautiful waterfall has attracted visits from artists, composers, and two United States presidents.

The only arched bridge made of stone on the entire Mississippi River.

Check the time in 145 countries at once with this East German relic.

Sip cherry liqueur at a bar dating back to 1840.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

One of the world's largest hedge letterings spells out this arboretum's name over 2,040 feet.

The largest earthwork effigy in the world.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

This demon atop the Notre-Dame de Paris looks utterly bored.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This modest marker near Notre Dame identifies the very center of Paris.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

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

Abandoned railway line circling the city of Paris.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

This stone complex marks the urban center of a lost civilization.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

This stunning mass of ice spans 121 square miles and is still growing.

A jungle in the heart of São Paulo reminds visitors of what Brazil looked like untouched by man.

One of São Paulo's tight urban intersections has become a haven for graffiti artists ever since a single Batman started the trend.