My friends and I are planning a trip to Weimar, Erfurt, and Eisenach for a weekend (getting to Weimar at about 3 pm on Friday, and leaving from Eisenach back to Berlin at about 4 pm Sunday). Is there enough to do during this time period? We're planning on visiting all the main sights in Weimar and Erfurt, as well as Buchenwald (near Weimar) and Wartburg Castle in Eisenach. However, I'm now concerned that there isn't enough to do that will last us for a weekend...any suggestions or advice? Any ideas are appreciated. Thank you so much in advance!!!!