A stunning, two-tiered waterfall made famous by poets, artists and the legend of a ghost dog.

A once grand hotel is being retaken by the wilderness it once capitalized on.

Now the final resting place of prominent artists and musicians, it was originally founded to separate the rich from the poor in death.

A peaceful international sculpture garden in upstate New York.

One man's swirling six-acre monument of stone.

For over 80 years, Mayan ruins stood proudly in a most unlikely location.

The only intersection in America where the buildings on all four corners were built pre-Revolutionary War.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Remote, volcanic island that Darwin, Hooker, and the Royal Navy shaped into a thriving, artificial ecosystem.

This was once the center of the Birdman cult, and is now a World Heritage Site.

The most alien-looking place on Earth.

Eritrea's futuristic gas station is a nod to Italy's fascist history.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

This secluded ruin was once a home for exotic plants.

Every animal in the torah taxidermied and crammed into a Brooklyn townhouse.

Spiral-bound community recipes and antiquarian gems mingle at this small East Village shop.

Home to some of the last true noodle artisans in New York.

D.C.'s first central library was born out of a chance encounter with the philanthropist whose name it bears.

This groundbreaking 16th-century map is known as "America's birth certificate."

This statue of the "father of television" stands prominently in the United States Capitol.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.