The headquarters of the Fraternitas Rosae Crucis, complete with Rosicrucian pyramids, all in the Pennsylvania woods.

Mysterious rocks that ring musically when struck.

Wayne Newton's sprawling estate is now open for visitors to catch a glimpse of his "heart and soul."

These banned cigarette vending machines now sell little pieces of pocket-sized art.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

Eccentric concrete mansion and museum designed and built by hand from the inside out.

Featuring the largest CinemaScope screen in Pennsylvania, this drive-in has entertained moviegoers for more than half a century.

Historic town settled in the 19th century because of its convenient location along a popular coal transport route.

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

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

This park contains a number of standing stones meant to heal and inspire.

A collection of haunted artifacts chronicles the career of the world's most famous paranormal investigators.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

This abandoned subway station can still be seen on regular commuter trips.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

A celebration of capitalism in Midtown.

Become a prohibition rebel.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Tucked in the back of this amazing antique store is an important piece of medical history.