Poland has put Adolf Hitler's former military stronghold, the Wolf's Lair, up for sale as the owners attempt to cash in on its notorious past.

The massive fortified base, which is situated on a 13-hectare site in a secluded forest in eastern Poland, can be rented out for around £90,000 a year.

The Polish Forestry Service, the owners of the camp, started looking for a tenant after the old 20-year lease expired.

The bunker was one of Hitler's main headquarters between 1941 and 1944 and it was at this base that an assassination attempt was made on the Nazi leader's life, when a bomb concealed in a briefcase by Count Claus von Stauffenberg just failed to kill Hitler during a staff meeting in July 1944. The incident was captured in the film Valkyrie, starring Tom Cruise.

Hitler and his henchman built huge bombproof bunkers at the site, which also held 2,000 members of staff and security personal.

Some of the quarters contained a casino and cinema located in the central part of the compound. The main headquarters also had its own electric power generator, railway station and an air strip.

Although retreating German forces blew up most of the bunkers in November 1944, their shattered shells became a tourist attraction, drawing 180,000 to 200,000 visitors a year.