Causes: It is caused by yeast called Malassezia, which normally exist in small numbers on the skin. Certain conditions however, can cause the overgrowth of the yeast, causing the development of white and reddish-brown spots on skin.
The 3 men all escaped and made it back to the Britain.   The Great Escape shown in the film happened in March 1944 having been planned first in January 1943. It consisted as per the film of 3 tunnels Tom Dick and Harry, Tom being discovered by the Gestapo.
Hidden Cave is an archaeological cave site located in the Great Basin near Fallon, Nevada, United States. It got its name from Mark Harrington, who first excavated the cave and had a hard time finding the entrance, who said at the time, This is one hidden cave!.