Places kheimlicher Wants to Go

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A nomadic museum known for its art exhibitions about religion and faith.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

Museum preserving torture methods from the past.

Widely advertised as Amsterdam’s narrowest street, this passage was once a highlight of the Red Light District before its windows closed.

A beautifully eclectic mix of architectural styles.

These public toilets also provide entertainment for visitors to Amsterdam’s Red Light District.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

America's only nuclear missile silo open to the public.

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

North America's oldest quarantine facility was built in response to Philadelphia's 1793 yellow fever outbreak.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

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

For more than 25 years, this Philadelphia store has been offering a wide selection of Victorian oddities and antiques.

Step into a pastel time capsule where candy is truly dandy.

Tour the dark and beloved poet's former cobwebbed basement, which may have inspired "The Black Cat."

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

A memorial to Chinese freedom in the city where American freedom was born.

Nose around a unique collection of more than 300 natural aromas used to craft fragrances.

A 1920s home transformed into an immersive art experience, where every room is a portal to another realm.

The peaceful gravesite of a rugged wild west gunman echoes the touching story of his last days.

The giant pair of sexy legs sticking out the window of this costume store have become its main draw.

Outside San Francisco lies a small clown cemetery and memorial.