This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Dramatic river bend surrounds a natural red-rocked pedestal.

Rippling sand dunes frozen in the Arizona rock.

Most-visited and most-photographed slot canyon in the American Southwest.

A striking sculpture built to honor the women of the Lakota and Dakota Nations.

One of the world's most definitive collections of musical instruments, spanning all cultures and historical periods.

This historic store hides a museum exhibiting a shoe-sizing x-ray machine and a pair of kicks that once belonged to the world's tallest man.

In a quiet north Chicago neighborhood rests a stunning relic of the golden age of earthenware design.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

Where Cusack's record store from the film "High Fidelity" was located.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

First planned industrial community in the United States.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

At Chicago's revered Field Museum, visitors are invited to learn about and literally explore DNA.

Years of archaeology, just chillin' by the water cooler.

All of Chicago's wood-paved streets are long gone but two alleys remain.

The subtle science of a master molecular gastronomist.

This shop for all your super spy needs hides an educational secret.

They sort through millions of dollars worth of diplomatic gifts on behalf of the government.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

The privately owned cemetery that holds room for Washington's finest when they step down from life.

Seemingly unremarkable items like empty sushi trays, chef hats, and freshness stickers are being preserved so future generations can look back on this beloved cultural import.

Housing the National Women's Party since 1929, this historic house is now a monument to the fight for gender equality.

One of the American Southwest's most extensive collections of Navajo rock art.