This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Check out the underground party scene at the "Burning Man of Brooklyn."

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

Lie in a hammock where George Washington stood.

A bit of retro transportation flair preserved in the world's largest department store.

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A popular European tradition makes its way to the states on one of America's most famous bridges.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

A magnificent waterfall nestled in the heart of the El Yunque National Forest.

The world's brightest bioluminescent bay.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.

Monumental sculptures of Patrick Amiot, constructed from debris, detritus, and determination.

A huge work of Burning Man-inspired outsider art on the grounds of a California winery.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

This knobby, drooping New Orleans oak is a favorite place both for climbing and for meeting giraffes.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

This historic "City of the Dead" lies prominently in the center of New Orleans' famous Garden District.

An abandoned warehouse turned art sanctuary in New Orleans.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.