An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

This massive Art Deco-inspired mural was the world's largest augmented reality artwork at the time of its completion.

A half-size replica of the World Trade Center towers above Tulsa.

The world's largest frame offers spectacular views of the city's past and present.

This futuristic building is yet another architectural wonder in Dubai.

This enormous sports car themed amusement park is home to the world’s fastest roller coaster.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

One of the oldest continually operated libraries in Kansas.

Some say that the battle fought at this Kansas site in 1856 was the first unofficial battle of the American Civil War.

A rock that was too big to move, so the town just paved around it.

This Las Vegas casino boasts one of only three spiral escalators in the United States—an engineering wonder.

Lone survivor from Custer's Last Stand forever preserved.

It's easy to see why this eclectic architectural wonder has been dubbed the "Spaceship House."

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

When ecosystems collide in the arid Southwest.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

An antique narrow gauge railway line still running through the Colorado and New Mexico mountains.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

The oldest continuously occupied public building in the United States.

A natural formation that resembles a camel resting in the New Mexico desert.

Neal Cassady may still have an open tab at one of Denver’s oldest watering holes.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

This museum offers an actual time machine back through Colorado's past.