This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Site of a former hidden treehouse in New Orleans.

Tiny historical streetcars wind through a small scale version of Crescent City in this whimsical train garden.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

An impressive collection of dollhouses and an homage to the frog-leg canning industry.

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

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

A former plague hospital turned medical museum.

A curious collection dedicated to human and animal anatomy and pathology.

"There's nothing there," and other lies the KGB told us.

Eighteen miniature death-scene dioramas.

The oldest stone house in Paris was built by its most famous alchemist.

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

A unique collection of gilded age mechanical pianos.

This Funeral Hearse Museum represents the finest in cadaver transportation.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Secret Swing.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

Sacred Buddhist home of some spiritual monkeys.

These 17th-century mummies are no longer naturally preserved, but remain on display today.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Thirty creepy ghosts now inhabit this decaying 14th-century church.