The Great American Road Rally: Celebrity Edition

Albuquerque, N.M. to Flagstaff, Ariz., the monster leg -- 325 miles over the Continental Divide and up into the pines.

Amarillo, Texas, to Albuquerque, N.M., over the caprock and into neon oasis country.

On the road from Oklahoma City, Okla., to Amarillo, Texas, the horizon flattens, the sky takes over and the Cadillacs grow out of the ground.

Traveling from Tulsa to Oklahoma, City, Okla.

From Springfield, Mo., to Tulsa, Okla., the shortest states, the densest lore.

From St. Louis, Mo., to Springfield, Mo., under the Arch and into the Ozarks, and caves, springs and the road's first real hills.

A hundred years after the first mile marker went up, the rally rolls out of Chicagoland.