My husband will be visiting my son who is studying abroad in Spain on March 26th. On the 29th they are flying out of Madrid on Ryan air to Frankfurt-Hahn (ie, the middle of no where). The original plan was to tour the Rhine area but now they have realized that many of the sites don't open until April 1st and they fly out of Dussedorf on April 2nd. Any suggestions on what might be good to see in the Cologene area? They have not planned well at all and I'm getting worried that they'll have no where to stay, etc.
FYI, my husband enjoys beer, and would love to try and new beer or tours in the area. They thought of going to Ricks favorite castle (can't remember the name right now) but that also does not open until April 1st.
Thanks