A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

A haunting collection of the vanished and disappearing natural world.

This massive library holds what was once the largest book collection in the world.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

The only museum with its curator—and her pets—buried inside.

Go inside to really appreciate this 500-year-old technological masterpiece.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

The first rural cemetery west of the Mississippi is home to the elaborate tombs of St. Louis' local beer barons.

The Magic House provides a beautiful and creative environment for curious youngsters to get their knowledge on.

A kitschy, creepy St. Louis mainstay.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.

Less a museum than a bizarre fantasy world created by artists and engineers.

This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

This two-room shotgun shack in Tupelo is the birthplace of a King.

The premier place to experience the Victorian imagining of the steam-powered future.

One man's dream has turned into this naturally growing chapel made of almost nothing but trees.

A New Zealand couple's shell-adorned home living room, now on display at the Canterbury Museum.

Three rooms of bones, curios, and one artist's collection of natural artifacts create this intriguing museum.

This aluminum “stairway to heaven” has impaled at least a couple of birds.

One of the world's largest pianos is displayed in the workshop of the man who built it as a teenager.

The ruins of New Zealand's largest classical-style church.