I have some time off I need to take in December and am thinking about traveling to Europe for about 10 days. I am in my mid-20s and on a budget and therefore will be staying in hostels for the most part. I am having a hard time figuring out where to go that will have most sights open. I am interested in architecture and history mostly so I enjoy taking tours/going to museums. I have traveled around Europe on a few trips with my family. Ive traveled to the "bigger cities" on bus tours (London, Paris, Lucerne, Rome, Florence, Venice, Budapest, Prague, Berlin, Munich, Venice) and toured Ireland, Belgium, and the Netherlands extensively. Places I considered were northern Italy, Spain, southern France, and England (since Ive only been to London) but wasn't sure if most things would still be open. I am definitely open to suggestions. In addition, I don't speak any other languages besides English unfortunately so I will need to travel to a place where I can get by only speaking one language. Any suggestions would be helpful. Thanks in advance!