The Karelian Isthmus, where the novel takes place, turns out to look a lot like the northern states of the American Midwest - Michigan, Wisconsin, Minnesota. But among these untamed lakeside forests, a much richer architectural past is hidden.
Enjoy the scenery. A lot of this land is now part of Russia.
Lake Vuoksa - Courtesy of Dmitri A. Mottl, 2009.
Perovka River - Courtesy of Евгений Адаев, 2008.

Viipuri Wyborg Round Tower - Courtesy of Merja, 2010.
Loincloth in Lappeenranta - Courtesy of Finbar_Mad, 2004.
Olavinlinna - Courtesy of Jussi Hellsten, 2010.
Boat Houses - Courtesy of Miguel Virkkunen Carvalho
Katherine Noel, reviewing the book for the New York Times, on the other hand thinks Chapman's premise is quite original.