The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

Home to a vast and influential collection of Shakespeareana.

A museum cafe showcases Native American dishes and indigenous ingredients from across the Western Hemisphere.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

This replica of the Greek structure is in the heart of Nashville.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

A uniquely lettered street sign marks the corner where the iconic word game was invented.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This kitschy tavern is also home to rare early editions of "Treasure Island."

Model Trains and Much More in Hamburg.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

A fearsome dragon clings to a corner of Munich's city hall.

One of the most easily accessible examples of the rare 1960s UFO houses.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

The patron saint of spinsters grasps a container of dried blood.

This historic funicular system combines the old with the new while offering delightful views over the surrounding valley.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

It's good luck to be mocked by this monkey.

Prove you deserve to be fed by Kenny Shopsin.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A monument commemorating the role of Alaska's native Tlingit guides in the Klondike Gold Rush.