My DW is, or was as she is now retired, an art teacher. At a meet and greet, one fellow passenger quizzed her on things to see in Florence. She gladly discussed it, as she loves to talk about art and share knowledge.
Another time, we were on an excursion that was back to Heathrow that included walking around the Dover and going to Canterbury on the way. The guide pointed out in Dover a bank of radar that was used for the RAF in World War II. I told him that her late father was one of those RAF pilots. They had a lively conversation following that.