Poland is hoping to turn Adolf Hitler's lair, also known as the "Wolf's Lair," into a tourist attraction.
Currently an investor is being sought to drive forward the project, according to Reuters. The site is famous for Colonel Claus von Stauffenberg's assassination attempt on Hitler, and was the center of the plot of Tom Cruise's 2008 film "Valkyrie."
The name "Wolf's Lair" is a play on Hitler's nickname, "Mr. Wolf."
"We are waiting for offers, but so far we have none," local forestry official Zenon Piotrowicz said, according to Reuters.
"The requirements are quite high because we want a new leaseholder to invest a lot, particularly in a museum with an exhibition that could be open all year long."
The ruins of the site are already open to the public, but tourist numbers are low due to the inaccessibility of the location deep within the forest. Currently the location can only be reached by traveling across dirt roads.
The lair was built in 1940 and 1941 to offer protection to top Nazi officials from bombing during Operation Barbarossa, the invasion of the Soviet Union. The lair was made into a fortress at the time, and was heavily surrounded by a minefield, which took a decade to completely clear following World War II.