Ruins of the elaborate house where the enigmatic costume designer threw glamorous parties for New York's theatrical elite.

Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

This Old Testament garden features 100 plants from biblical times.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

The abandoned coal loading dock is a canvas for unsanctioned art.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

This charmingly homemade amusement park has been growing for 40 years.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

An antiquated German apothecary on Chicago's North Side.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

This maze-like slot canyon is a unique gem within an already fascinating geological area.

The longest navigable underground river in the United States is home to countless blind and albino animals.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.

One of 100 “Whaling Wall" murals painted in 13 different countries by a renowned marine life artist.

The largest earthwork effigy in the world.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

The curiosities and wonders of pharmacy in a delightful historic building.

A whimsical village of unique treehouses resides in a Washington forest.