Taking a vacation by train can be a fun way to spend some time off, with packages ranging from frugal Amtrak trips in the U.S. to 21-day luxury rides from Beijing to Moscow. (Lars Leetaru/The New York Times) — NO SALES; FOR EDITORIAL USE ONLY WITH  TRAIN TRAVEL ADV04 BY SHIVANI VORA FOR DEC. 4, 2016. ALL OTHER USE PROHIBITED.
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