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One of Space Adventures' ISS modules, submerged in the hydrolab at Zvezdny Gorodok, or "Star City." Star City, where much pre-flight training takes place, was once a highly classified facility, so secretive that its existence was largely unknown to most of the Soviet military. Built in 1960 and protected by thick walls, barbed-wire fences and gun-toting guards, Star City is the training site of every Russian crew to fly into space.
The Neutral Buoyancy tank in Star City offers a good simulation of weightlessness on Earth. In the hydrolab, cosmonauts can test equipment and practice techniques used during Extra Vehicular Activity at the space station.
This photo was taken by Greg Olsen on his trip to the ISS in October 2005. The tech entrepreneur paid $20 million for the trip. Olsen made his fortune by selling his first company, Epitaxx, for $12 million. He then founded Sensors Unlimited in 1992, sold it for $700 million in 2000, repurchased it for $6 million in 2002 and sold it again for $60 million.