This medieval church is the only one in the world that features all Marc Chagall stained-glass windows.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This unique bridge curls up like a caterpillar to let boats pass and then unfurls again to span a small canal.

These floating gardens show what Mexico City used to look during the Aztec Empire.

A replica viking ship from the Chicago World's Fair is still in dry dock in an Illinois park.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

A hidden grotto on the grounds of the Kane County Government Center.

A lush green oasis in the middle of Chicago.

The final resting place of the world's first nuclear reactor.

Museum dedicated to the art of cutting and polishing stones.

World's second largest particle accelerator, where nature reveals its secrets.

A tribute to one granddaughter's old apartment which now represents the whims of each visitor.

Arguably the best example of an authentic Dutch windmill in the United States, rivaling its counterparts in the Netherlands.

This historic lavatory leftover features two levels of defecation stations completely without context.

A natural wonder in south Denmark.

The original home of the Lego has a huge amusement park dedicated to the iconic plastic toy.