I left my heart in San Francisco High on a hill, it calls to me To be where little cable cars climb halfway to the stars The morning fog may chill the air, I don’t care Originally recorded by Tony Bennett, ‘I Left My Heart in San Francisco’ perfectly captures how I felt after my first visit to one of the most iconic American cities. Perhaps I am being a bit melodramatic, but few would argue with the charm of San Francisco. Despite the very large number of homeless people sleeping on the streets of this Californian city, San Fran is the highest rated American city on world liveability rankings.…