Ready to cross a whackload of items off your must-see list? This 21-day circuit through the east coast of the United States leaves no stone unturned. Feel the thunderous roar of Niagara Falls on a Maid of the Mist boat tour, dig into deep dish pizza in Chicago, and explore the Home of Blues, Soul & Rock 'N' Roll with a free day in Memphis. And since this tour starts and ends in New York City, it's easy to plan for additional time to explore the city that never sleeps.