The main city thing that I think really adds stress is noise. Of course crime would as well; I am lucky enough to live in a safe neighborhood.
But crime can happen anywhere, so I don't know if that counts as an urban stress.
And I am exceptionally good at using city parks -- today I went to one Trader Joe's instead of another because I could use a route that allowed me to walk through Central Park. Takes an additional 15-20 minutes but worth it.