Make tracks to Fort Grossfurst Konstantin and learn about its role in defending the area. This structure has witnessed some fascinating history in its time.
You're spoiled for sightseeing choice when spending time in Karthause. Fort Grossfurst Konstantin is a great place to begin here, but there are many other worthy places to appreciate. Deutsches Eck, Ehrenbreitstein Fortress, and Emser Therme are near the history-filled fortress and will top off your day nicely.