An architect's childhood fantasy treehouse made real.

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

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The only natural lake in the world that drains into both the Atlantic and Pacific Oceans.

The world's largest military aircraft cemetery.

This church on a Tohono O'Odham reservation has stood since 1797.

Despite a recent paint job, the factory still sits empty.

This iconic 1958 tower welcomes air travelers to Tucson with neon-lit letters and architectural style.

A homage to the King at the hotel where he revived his career.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

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

The famous blue house from the classic horror film "Halloween" is now a local landmark.

Artist Jack Pierson made this surreal sculpture in honor of Wonder Valley, a countercultural community on edge of civilization.

Brightly colored 30-foot-tall totems light up the desert sky just outside Las Vegas.

The "world's biggest dinosaur" once housed a creationist museum in its abdomen.

A pair of large white marble lions guard this stretch of the Mojave Desert, and it is utterly mysterious how they got there.

This mostly abandoned shopping outlet is now adorned with beautiful graffiti and murals.

An old California photo stand has been turned into a shrine to the cozy art of crochet.

The abandoned train depot now doubles as a well-placed rest stop for those who take the road less traveled.

The largest dune field in the Mojave offers a chance of hearing the 'singing sands.'

One of the ghostly stops along Route 66.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

This giant temperature attraction created some giant electric bills.