At each step on this USA tour, you’ll be moved by the sheer beauty and power of the natural world. The California Zephyr Train sets a high bar as you embark on one of the most beautiful rail journeys in North America, snaking through rugged canyons and skirting the great Colorado River as you climb into the Rockies. You’ll then seek out sunset red spires and soaring monoliths across four USA National Parks, including the utterly humbling Grand Canyon. We bookend the holiday with two fascinating cities; starting in ‘Mile High’ Denver and ending in the fantasy land of Las Vegas.