What have the Romans done for us?

Back home now. Three buses and a train. One effect of my Bus Pass Adventure form of travel is that it gives you ideas for future travels or visits. This trip was enjoyable, although the heat limited what I was able to do, for instance, I didn’t get to explore the Roman origins of Colchester. 
My last leg was by train from Thetford  - i bought a cheap ticket some weeks ago. A poster on the station is in extras.