This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The fossilized remains of ancient California redwoods.

California's own majestic geyser is powered by a subterranean volcano.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

Visit a remnant California's Gold Rush, which locals claim is haunted by spirits from the past.

The tallest bridge in California was constructed for a project that was eventually cancelled.

This 19th century hydroelectric powerhouse was the first of its kind.

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

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

A working miniature city designed to teach kids about safety and presumably city planning.

Puzzling...this tree looks like an assemblage of dismembered monkey limbs.

The capitol city's oldest existing cemetery.

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

Art Deco stylings conceal the true nature of this bridge.

A replica of the first public theater built in California.

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

This 15-story mural celebrates the 50th anniversary of the musician's iconic "At Folsom Prison" album.

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

A pair of stones embedded in an Edinburgh street memorialize one of the city's last public hangings.

The building where Mary, Queen of Scots was said to have bathed in white wine.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.