A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

Perhaps the most scandalous statue of America's first president.

The legend of a local monster still haunts this small town.

This working class sculpture pounds his hammer all the livelong day.

A museum dedicated to the history and exploration of both popular music and science fiction.

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

The king of U.S. high points towers over every other peak on the continent.

Four-story concrete hotel never opened to customers.

A high school astronomy enthusiast designed this model of our solar system to be traversed on foot.

This WWII-era military installation once held an entire city within its walls - now, its walls are falling down.

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

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

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

One man's ambition created this psychedelic log home.

At the time of its completion, it was the tallest dam in the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

A pair of giant roadside arrows are all that remains of a former Route 66 trading post.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A classic Route 66 landmark that was built with scrap lumber and is held together with kitsch and puns.

An homage to everyone's favorite prehistoric cartoon family.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.