On January 4, we stayed local and visited Römerkastell Saalburg und Archäologischer Park, a reconstructed Roman fort that was initially built in the first century AD, also part of a UNESCO World Heritage site.
The archaeological park out front had extensively-excavated ruins from the original village outside the fort. The system for heating the floors in the bath was fascinating and far more advanced technologically than what I think of during that time period. I was also surprised by all the glass windowpanes and tools in the museum.
I didn’t take many photos inside because there were simply too many really fascinating, ancient artifacts to decide which to photograph. This was a chest of ancient coins in the basement of one of the buildings.