One of the main things I like to do in cities are parks. If I’m travelling and my hotel for the night is in a downtown area I look on a map to see if there are any parks around, doesn’t matter if they are wild, manicured, artsy, or historical, as long as they are outside and are preferably not team-sport-oriented.
I’ve been to London 3 times and the firm plurality, maybe even the majority, of my time spent doing “city” things has been spent in or going to parks, moreso than museums or entertainment.
My spring vacation was supposed to happen a month ago and I purposely booked a location in downtown Fort Worth so I could see the famous Water Gardens again. I was also going to see some museums but the main reason for my stay would be the gardens.