In Florida, these naughty monkeys live on their own mini-monkey Alcatraz.

At 135 years old and counting, this historic print shop is heaven for poster nerds and music buffs.

An abandoned water sports stadium that has become a haven for graffiti and decay.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

Golden Gate Park's historic collection of plants.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Storyville was New Orleans' historic red light district and hotbed of jazz music, sometimes referred to simply as "The District."

The first park built over a freeway is a brutalist masterwork.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

The United States’s oldest funicular railway glides up and down a steep Pittsburgh street.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

A wall of chewing gum moonlights as collective art.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

This former coal gasification plant found a curious second life as a popular public park.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

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