This monument is dedicated to Balto, the heroic Alaskan sled dog.

This magnificent herd of stampeding elephants has been frozen in time for over a century.

Outstanding taxidermy dioramas showcase the grandeur of the continent's wildlife with spooky realism.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

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

Elevated freight railway turned wildly successful urban park.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

An all-American grocery store in Paris sells U.S. "cuisine" like Pop-Tarts and Heinz ketchup to homesick ex-pats.

A terrific purveyor of natural history objects and curios.

Montmartre's sole surviving windmill became an iconic landmark for 19th-century painters, artists, and bohemians.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

This demon atop the Notre-Dame de Paris looks utterly bored.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

Site of a classic 19th-century physics experiment to prove the earth is rotating.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

Legend holds that this knife serves as a chilling reminder of the deadly rivalry between two local builder brothers.