Months ago we made some loose plans/bookings for a trip mid-Dec through early January to visit close friends and do a little exploring while there. Normally I do a lot of research and plan travels out up to a year in advance. But, the constant changes with COVID prevented us from committing to too much. Now that we are fairly confident our trip will in fact be able to happen (whole family, kids included will be vaccinated), we've found that a few of our ideas need to be reworked to fit better with our friends' time off from work.
We are flying in to Frankfurt and going first to Nuremberg. From there, we'll spend Christmas with our friends in Giessen. Originally we were going to go to Bavaria after Christmas and stay there until New Years. However, we've decided to return to our friends earlier so we can spend New Year's Eve/Day with them also.
This leaves us Dec. 27-Dec. 31st to explore somewhere (this includes travel days). We no longer want to travel as far as Bavaria. We won't have a car, so public transportation is a must. We have two boys, ages 12 and 9 who are very active. They can tolerate some museums, but we wouldn't want to take them to an art museum, for example. My older son is interested in and has studied WWII history. My first thought is to travel to Erfurt and explore the area out there. Seems like we could take some day trips. Is this a good option? Any suggestions on things to do with the kids in the region? Or do you have a different idea of where we could go? In years past, we've been to Cologne and to Munich.