GW Travel Ltd.
Asia
This is one of the most ambitious voyages in luxury train travel—21 days from Beijing to Moscow, following the ancient silk traders' route. Along the way, passengers can see the terra cotta warriors of Xi'an, dine in Kazakh yurts, and visit the remains of 12th-century trade outposts. The scenery ranges from the lush Yellow River Valley, to the stark desert of Central Asia and the bustle of Moscow. Onboard experts lecture on the history and culture of each region. The cost of the 7,000-mile journey starts at $18,495 per person and can range as high as $32,995 in a one-person Gold Class cabin.
http://www.gwtravel.co.uk/tours/Silk/china.htm