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

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

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

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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

The oldest operating pharmacy in the world features 800-year-old recipes.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

A huge enchanting public park just outside the ancient walls of Rome.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

Its vast collection details the history of this Santa Barbara beach town.

At 130 years old and 126 feet tall, it is the largest known example of the rare Torrey pine tree.

Inky sludge oozes to the surface of this beach thanks to a rare natural tar seep.

Happy harbor seals frolic and snooze on this warm, sandy stretch of coast.

An eccentric home stands out in an otherwise average neighborhood with mosaics, mini topiaries, and kinetic sculpture.

Pillars made of 700 pieces of luggage climb to the ceiling of Sacramento Airport's baggage claim.

Art Deco stylings conceal the true nature of this bridge.

I Street Bridge is the heaviest swinging center bridge in the United States.

This 19th century train workshop is a treasure trove of railroad history.

The last of a gourmet supermarket chain, this store helped spark California's Food Revolution.

The capitol city's oldest existing cemetery.

At this 1940s-era neighborhood favorite, you can still drink a cherry phosphate.

The California capital city once stood 10 feet lower than it does today.

Before it was abandoned and left to rust alongside the road, this riverboat starred in a John Wayne movie.