The Olympic Games are just around the corner, and thousands of curious visitors are coming to the site to see where all the London 2012 action will take place. Join Alexandra Topping on an alternative walking tour with Simon Cole, of Hackney Tours, to discover the area's greenest spaces and most interesting historical facts, as well as the top views and the best hot chocolate Take the tour on Foursquare – add our tip list to follow the tour using the social check-in site