This small city where almost everyone lives in the same building can only be reached via North America's longest tunnel.

An Alaska livestock farm devotes itself to harvesting wool from creatures that once ran with mammoths and sabertooth tigers.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The world's smallest park was dedicated in 1948 as the only colony for leprechauns west of Ireland.

Portlandia is the second-largest copper repoussé statue in the United States.

The World's First 24 Hour Coin-Operated Art Gallery!! Plastic, Styrofoam, and Elvis--If you can't get rid of it, you might as well worship it!!

The magic's in the hole!

Statue of Lenin, from Cold War era Czechoslovakia, now in a neighborhood of Seattle.

A wall of chewing gum moonlights as collective art.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A trading post in the North Pole where children send letters.

Four-story concrete hotel never opened to customers.

The world's second-largest excavated hole.

What happens when a sculptor has to find a way around a 100-year-old copyright.

A working steam clock, one of only a few in the world, located in Vancouver's Victorian Gastown.

The coldest city in the world.

The first declared National Monument in the United States.