The headquarters of the Audubon Naturalist Society is a small slice of heaven for nature lovers.

An abandoned church gets a second life as a massive beer hall and event space.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The skeletal white beams stand as a monument to religious dissent.

This scented city oasis was a labor of love.

This research center for rare prosimians is studying how they sleep to help prolong human life.

A 120-year-old legend concerning an empty circular patch in the North Carolina woods.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

This abandoned amusement park was built on a site with a dark history.

A park full of outsider art, created by college students studying outsider art.

"Dark Sky Park" is heaven on Earth for astronomers, one of the rare U.S. locations with no artificial light pollution.

These beautiful ruins deep in the Pennsylvania woods are thought to have been a ski lodge or a speakeasy, but no one really knows.

Frank Lloyd Wright's most iconic home dangles over a Pennsylvania waterfall.

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

A sculptor's dream castle turned fantastical ruin.

This woodland architectural installation acts as a camera obscura for the heavens.

These eerie outliers of the lightning bug family glow a mysterious blue color.

Along the Palisades skyline are the ruins of a large mansion built in 1911 and demolished in the 1930s.

Whimsical artist house in the New Jersey woods.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

In the woods of New Jersey lie the ruins of a munitions village abandoned after World War I and the remnants of a 1920s wooden racetrack.

Step into Monet's world at this fine-dining restaurant in the middle of a New Jersey sculpture park.

A recently abandoned psych ward at the end of Sanatorium Road.