A Polish explorer says he has found a massive underground structure in south-western Poland that he claims was built by the Nazis as a nuclear shelter for Adolf Hitler.
Krzysztof Szpakowski said he has "no doubt" about the find, which he says was based on evidence he has gathered for decades, including witness statements, old documents and an examination of the area with ground-penetrating radar and dowsers.
Speaking on TVN24, Mr Szpakowski said the structure was part of a system of railway tunnels and corridors the Nazis were building during the Second World War around the city of Walbrzych.
His press conference was hosted by Walbrzych regional authorities.
Two other men claim they have fund another tunnel at a separate location in Walbrzych that contains a Nazi train loaded with weapons and treasure.