Visiting a 'Top Secret' Spy Museum

 A coat, traditional symbol of espionage, is placed at the entrance of the 'Top Secret' Spy Museum.

 A gold plated Kalashnikov is seen on display at the 'Top Secret' Spy Museum in Oberhausen.

 

 A microphone is concealed inside an artificial cherry placed in a martini glass at the 'Top Secret' Spy Museum.

 A mock-up of a pigeon with a small camera is seen on display at the 'Top Secret' Spy Museum in Oberhausen.

 A pistol to shoot chemical substances to mark people and objects, used by the Federal Intelligence Service Bundesnachrichtendienst (BND).

 A sign 'Caution with your conversation - The enemy is listening!' is pictured at the 'Top Secret' Spy Museum.

 A small photo camera placed in a book and used by the U.S. Central Intelligence Agency (CIA), is displayed at the 'Top Secret' Spy Museum in Oberhausen

 A telephone for eavesdropping is seen on display at the 'Top Secret' Spy Museum in Oberhausen.

 A visitor looks at a video screen at the 'Top Secret' Spy Museum in Oberhausen, July 10, 2013.

 A World War II German Enigma cipher machine is on display at the 'Top Secret' Spy Museum in Oberhausen.

 Ciphering equipment used by the Federal Intelligence Service Bundesnachrichtendienst (BND) is seen on display at the 'Top Secret' Spy Museum in Oberhausen.

 Different kinds of arms used by spies are seen on display at the 'Top Secret' Spy Museum in Oberhausen.

Eavesdropping equipment of the former East German Ministry for State Security (MfS), known as Stasi.