Golden Eagle Luxury Trains is about to make journeying to Russia even more memorable by celebrating the 100th anniversary of the Trans-Siberian Express railway with two new routes planned for 2016. Golden Eagle’s current 12-day tour travels a quarter of the planet’s circumference and through eight time zones between Moscow in the west and Vladivostok in the east—riding the longest point-to-point rail system in the world, completed in 1916. On the way, passengers receive private admission to the Kremlin; swim i…