Edinburgh. Edinburgh simply became my favorite city since my 3-day visit during the last winter. I really loved the city mainly because of its historical buildings and the ghost tours. I stayed with an AirBnB host family and they provided me a map labelled with points of interest which was super helpful. Now that I find out the University of Edinburgh offers really great programs in my research area, I love the city even more and I even want to move there... I got there from London by train by the way.