Former headquarters of the KGB.

Moscow's other, lesser known kremlin is a fairytale-like cultural complex modeled after Old Russia.

It took over half a century but a Russian monument to a famous and tragic space pup finally stands in Moscow.

This iconic Russian space museum sits on a landmark space production facility and houses the Vostok 1, the first manned spacecraft, that was also built here.

Secret Soviet city once home to Russian cosmonauts and space training facilities.

This TV tower once secretly housed a GDR intelligence team.

The music is over at the Ballhaus Riviera Ballroom, but the ballroom remains in haunting disrepair.

The metal-free wooden towers of Brück.

The natural mummy of the less than chivalrous Knight Kahlbutz.

The resting place of 18th century German mummies.

The architect of this fanciful complex called it an "oasis for humanity and nature in a sea of rational houses."

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

A quaint Russian village in the middle of a German metropolis.

The 1936 Summer Olympics site is a crumbling remnant of sportsmanship and a history its host country would like to forget.

The site of good faith and good nature in the fictional world of Kcymaerxthaere.

A wunderkammer of mysterious objects and stories.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

Dozens of padlock-trees along the Moscow River.

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

Hidden in a metro shop under a shopping mall, this small museum tells the story of one of the world's largest urban transit systems.

Moscow's most popular cemetery includes the graves of numerous cosmonauts.

This Romanian village may have been drowned, but it is long from forgotten.

Gigantic Romanian salt mines used to heal respiratory conditions.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.