These markers are used to determine the ground stability of the Strip.

An enormous illuminated figure dances on the Las Vegas strip.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

Millions of dollars worth of sculpture decorate this Iowa city center.

Home with Gothic windows featured in a famous painting.

A half-mile long and three stories high, this bridge over the Des Moines River Valley mimics a descent into a mine shaft.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

A giant pair of thick black glasses mark the tragic demise of a trio of rock and roll legends.

A famous alternative culture epicenter and where Joplin serenaded young hippies.

Half of a house.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

One of just a few cities in the world to base their center of government on an island. Others: Paris and Osaka.

Come for the flowers, stay for the bats!

A collaboration of art and ornithology mourns the calls of Sydney's lost birds.

This private residence was the template for one of the most beloved television homes of all time.

Thirteen trees representing the original thirteen colonies were planted with soil from historic Revolutionary battlefields.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This painted marvel is San Francisco's 400-foot ode to urban biking.

The neighborhood church casts a breast-shaped shadow that locals have come to call the “two o’clock titty.”

Chevron maintains one “Standard” brand station per state so it doesn’t lose the trademark.

Recovered from the brink of extinction, at home in the Financial District.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.