Jens Gluessing said in his book, "The Guyana Project: A German Adventure on the Amazon," that German scientists visited an area near the border with French Guiana as part of a Nazi plan to colonize the region, The Daily Telegraph reported Friday.
Gluessing said he uncovered photographs of the expedition in German and Brazilian archives and discovered a 9-foot high wooden cross covered with swastikas on an island on a tributary of the Jari River.
An inscription on the cross reads: "Joseph Greiner died here on 2.1.1936, a death from fever in the service of German Research Work."
Greiner was one of three Germans sent to scout the region by Heinrich Himmler, one of Hitler's top lieutenants. However, Gluessing said Himmler apparently lost interest in the project before the colony plans could advance.