Around half a million years ago, these magnificent columnar basalt cliffs were formed from cooling lava.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

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

The first declared National Monument in the United States.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

Roses and other fascinating flora fill this garden built to commemorate Britain's immortal Bard.

This 47-foot chile pepper sculpture welcomes Scoville heat unit obsessed tourists to the Big Chile Inn.

The top of a giant mesa, just outside of Amarillo, appears to float in the sky above.

This water tower slanted at an uncomfortable angle off the old Route 66 was an ingenious marketing ploy.

An Oklahoma museum that celebrates the history of the "Mother Road."

Buy a token from the liquor store and you can make this beast spew flames on command.

The world's largest collection of the world's largest objects is in one small Illinois town.

This titanic java kettle is one of the many kitschy landmarks located along America's OTHER famous highway.

The oldest continuously inhabited street in America.

This stone tower marks a lookout point over the historic Washington Crossing, and maybe some buried treasure.

This candy-striped tower is the farthest east you can go in the United States.

These light, hollow rolls have been linked to Acadia National Park since the 1890s.

Forrest Gump ran past this iconic Maine lighthouse in his cinematic cross-country journey.

An unusual assortment of steerable wooden sleds is on display in a library in New Jersey where they were first invented.