Votkinsk, the birthplace of composer Pyotr Ilyich Tchaikovsky, may have been founded in 1759, but during Soviet times the city didn't make it onto most maps. The Soviets had their reasons for keeping Votkinsk under wraps. Built on a tributary of the Kama River, the city was settled by decree of the Empress Elizabeth to house employees of Votkinsky Zavod, a steel works plant that remains one of the largest defense plants in Russia today. Originally the plant busied itself casting parts for steamships, barges, and bridges, but during World War II the plant was militarized, producing various artillery and...