54.0792321.493121The Wolf's Lair (pl: Wilczy Szaniec, de: Wolfsschanze) (just east of Ketrzyn, accessible by car or touring car using a newly paved, but very narrow, road), ☎ +48 89 752 4429, e-mail: firstname.lastname@example.org. 8:00 until dusk. The former Nazi Headquarters where Hitler resided during most of World War 2. Visitors can tour freely or with a guide around the ruins of bunkers and other buildings of the former secret town. There is also a hotel at the site and a restaurant. It is possible (with no additional fee) to stay overnight in a tent or in a mobile home in the area and electricity and showers are available. Adults: 15 pln, Children and students: 10 pln, Parking (Car): 10 pln.