This mansion on an island off the coast of Georgia once belonged to a 108-year-old heiress.

After several centuries as the home of coastal defenses, this island is full of history—and maybe ghosts.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

The grounds of former plantations where abolitionist Harriet Tubman spent her youth enslaved are now a museum to her incredible life.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

This English-inspired Maryland garden is home to acres of opulent plant life including bushes shaped into an entire fox hunt.

Bizarre Cavern.

This home is decked out like a psychedelic explosion of colors and bowling balls.

What is it about mushrooms that makes people wish they lived inside of them?

19th century cemetery hidden in Brooklyn's Prospect Park.

One Brooklyn man's collection of life-size fiberglass statues has taken over his entire yard.

This stunning sea creature-shaped home blends into the landscape like a fantasy villa.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

A bizarre house filled with an astounding array of collections.

A micronation on an islet along the coast of a Portuguese island.

A clerical error gave rise to this imaginary micronation in the southwestern corner of Estonia.

The ruins of a grand theater destroyed during the most powerful seismic catastrophe ever recorded.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Built as a gift to the hottest tastemaker of the time, these hidden quarters remain an Art Deco showpiece.

A remnant from the golden age of aviation still in use today, Pan Am's Clipper service took off from this Art Deco gem.

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