If you need some nice Topographic maps for hiking purposes, you can download those at http://gps.maroufi.net/mapdownload.shtml.
Another good source seems to be http://freizeitkarte-osm.de/de/deutschland.html.
There are two kinds of Maps. The ones on the left side are for the use with the Garmin device. I usually copy those to the SD card in the directory /Garmin.
Hi Markus,
another good source for maps is http://openmtbmap.org/de/ , I use them for mountainbiking and hiking with the Garmin GPSMAP60csx.
Regards,
Michael
@Michael Hi Michael, thanks for the tipp 😉