Archaeologists have discovered an outpost in a remote jungle in Argentina which is believed to have been built for some of the Führer's top aides.
German coins from 1938 to 1944 were found in the hideout and experts predict the Nazis created the building as a safe haven in the event of their defeat.
It comes after a Nazi-hunting author claimed Hitler faked his death and then fled to Paraguay via Argentina before settling in a small Brazilian town.
In her book Hitler in Brazil - His Life and His Death, Simoni Renee Guerreiro Dias claimed the evil dictator did not die at the end of the Second World War.
Instead of committing suicide with wife Eva Braun in a Berlin bunker on April 30 1945 Ms Dias says she has EVIDENCE Hitler lived until he was 95.
She wrote in her conspiracy theory book that Hitler assumed the name of Adolf Leipzig in Brazil and had a black girlfriend before his death in 1984.
Ms Dias claimed Hitler was known to the 12,000 locals in the town of Nossa Senhora do Livramento as "the Old German".
Central to her claims is a grainy picture which the conspiracy theorist said shows Hitler with his Brazilian girlfriend Cutinga prior to his death.
Ms Dias insisted that Hitler was using his lover Cutinga to hide his true identity as a vile Aryan supremacist.
This grainy picture has been claimed to show Adolf Hitler and his Brazilian lover
Speaking in January 2014, the author demanded that the dictator's remains were exhumed and his DNA tested tested against his living relatives.
At the time she told journalists in Brazil: "I just laughed at first, I thought it was a joke.
"Today I'm convinced it is true and Adolf Hitler didn't end up here by chance."
The suspected Nazi outpost which Hitler may have fled to after allegedly faking his death was discovered in a remote jungle in Argentina.
Conspiracy theorists have long argued Hitler escaped from Germany
Speaking to Clarin, archaeologist team leader Daniel Schavelzon said: "Apparently, halfway through the Second World War, the Nazis had a secret project to build shelters for top leaders in the event of defeat – inaccessible sites in the middle of deserts, in the mountains, on a cliff or in the middle of the jungle like this."
The stone building was built just across the Rio Parana from Paraguay and is situated near the Brazilian border.
Local legend has it that Martin Bormann, Hitler’s private secretary, built a different hideout elsewhere in the region.
Argentina was one of the South American countries that Nazis fled to to avoid prosecution after the end of the Second World War.
The Third Reich's Dr Josef Mengele and Adolf Eichman found refuge in the country.
Then Argentinian President Juan Domingo Peron let Nazi war criminals live with full citizenship and often under false names.
Conspiracy theorists have long argued Hitler escaped from Germany and fled to south America.
The most recent claims by Ms Dias have been rubbished by academics.
Candido Moreira Rodrigues, a history professor at Mato Grosso's Federal University said: "There's nothing new in people who claim to be historians coming up with the most far-reaching theories about Hitler supposedly living in south America and subsequently dying in one of the countries in this region."