A lush green oasis in the middle of Chicago.

Be(w)ar(e) the moat around this historic Czech castle.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The oldest amusement park in the world has been providing a nice spot to have some fun since the 1500s.

A Hawaiian stairway to heaven—that you can't climb.

The air force base preserves its scars from the Japanese attack on Pearl Harbor.

Watch the newest land on the planet form before your eyes.

Beach instrument turned bed and breakfast.

One of the world's largest tanks mimics the experience of watching rare whale sharks, giant rays, and deep sea creatures from the ocean floor.

The literary king of the Jazz Age was born in this lovely Minnesota home which still honors his legacy.

The home where a lovestruck Fitzgerald wrote his first published novel, "This Side of Paradise."

These curious caverns have been home to mushrooms, gangsters, and disco.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

A bronze statue on a downtown corner honors Minneapolis's favorite career gal.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

Eight "Guardians of Health" protect this art deco water tower from pollutants and bacteria.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Find out what it sounds like when doves cry at Prince's recording studio estate turned museum.

New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.