Living in a City gives SO much choice that isn't available living rurally.
I don't have a dog, but there are lots of dogs in our road and so many places to walk them - parks, woods, hills, country parks, riversides, canal tow paths, as well as just round the roads. My friend, who lives very rurally with her dog, has to put her dog into her car to go somewhere safe to walk him as they have no paths on the roads near them.
I like sport - I find it very relaxing watching, and I have the choice of so many places I can watch spot (or - if I were so inclined, which I'm not - there are hundreds of places I could take part in so many different sports or types of exercise).
I am not particularly fond of museums or art galleries, but there are several in my City if that is how you relax.
I like the theatre - there are several in our City you can go to.
Some people find shopping relaxing
Many of us decompress by meeting a friend. In a City you have hundreds of options - coffee, lunch, a pub, a restaurant from a plethora of different counties and cuisine, cafes, a bar, street dining. Generally at a much more competitive price than rurally due to the competition
Clubs / Groups / Hobbies - I enjoy singing. I can think of about 30 different choirs within easy reach of me, so am able to go and get the endorphins flowing, whatever type of music I prefer. There are just 100s upon 100s of things you can go to with friends or on your own to relax, or have fun with other people.
Of course, some people decompress with a bath and / or a good book - which you can do wherever your home is.
It just seems like such an odd question to me.