An unmistakable vibe pervades the languid Mississippi Delta town of Clarksdale, about an hour's drive south of Memphis, Tennessee. It's by turns eerie and endearing, a flat landscape where fertile fields, endless railroad tracks, and run-down shacks are giving way to pockets of progress -- an upscale restaurant, a strip mall full of dollar stores and fast-food drive-throughs, a museum celebrating the blues music that took root here in the early 20th century and changed the course of popular music.

This is a good place to begin a driving tour of legendary Hwy. 61 (U.S. 61), the two-lane road that took blues legends such as Muddy Waters, Robert Johnson, and B. B. King north from the impoverished cotton plantations of the South to the cities of Memphis and Chicago to the north. The long drive south will take you through the proverbial dusty Delta towns, and cities such as Greenville, Vicksburg, and, finally, where Mississippi meets Louisiana in the southwest part of the state, historic Natchez.