Part of Project Riese, the Osowka underground complex is part of a larger underground project of the Nazis during 1943-1945. Persons interested in World War II will find this site, one of the largest in the network, fascinating. Additional information about this Nazi project may be found at http://www.osowka.pl/miasto.html and http://en.wikipedia.org/wiki/Project_Riese. Most of the tour requires considerable dexterity. This is not advisable for persons requiring walkers and wheelchairs.
While Project Riese is listed as being in Wroclaw, that's really not the case. Wroclaw is probably the closest major airport, but the Osowka is probably an hour and a half to two hour drive from Wroclaw.
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