This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

The only surviving piece of Copenhagen's 16th-century defensive wall.

Site of the first radio and telephone broadcasting companies in Copenhagen.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Pre-Nazi swastikas adorn the sculpted pachyderms flanking this brewhouse portal.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Commemorating the spot where the famous scientist fed his pigeons.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

A bit of retro transportation flair preserved in the world's largest department store.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Lady Liberty's first beacon of enlightenment is now displayed in a museum near the statue.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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

One of only two commuter aerial tramways in the United States.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

Sculpture designed by Turkish artist and professor Mehmet Ali Uysal.

This ordinary street was made infamous by a legendary visit from the devil.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

Once a meeting point for great thinkers, and the midpoint of the country.

The final resting place of the author who gave us the Little Mermaid, the Ugly Duckling, and many more beloved fairy tales.