Overview: In Turkey Dan visits the Derinkuyu underground city carved into the rocks in Cappadocia and the Hagia Sophia (former Byzantine monster cathedral, now a mosque) in Istanbul. In Russia the Moscow metro, Solovetsky Monastery at Solovki and Peter the Great's cabin at St. Petersburg star, in Poland salt mine carvings at Wieliczka, finally in Germany the Volkswagen Beatle in Berlin and the Brno Chair at the Bauhaus in Dessau.