Running under an entire mountain, the longest highway tunnel in North America is kept fresh using portal fans and jet fans.

Half of a waterfall goes into the river while the other half seems to disappear.

The watery grave of an impractical idea.

The giant club-wielding wildman stands proud as the symbol of Swedish Lapland.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

A popular place to pick up prehistoric coral fossils from the time when Michigan was an ocean.

Clap your hands at the base of the pyramid, and the song of a sacred Mayan bird will echo through the air.

A backdoor to Machu Picchu that only the most foolhardy infiltrator would attempt to breach.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

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

The most confusing clock in New York.

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

There must be a pun in this haystack somewhere...

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

A serpentine highway twists and turns over the treacherous Norwegian Sea.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

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

The largest portal tomb in Europe has a capstone weighing around 150 tons.

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

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

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

Longest road tunnel in the world features an air treatment plant and the illusion of daylight.