Looking like something curvy and top-heavy that’s straight out of ‘LazyTown’, the Walkie Talkie is a City office building that has a Sky Garden on its top floors, which, happily, is open to the public. Take in a huge concourse of lush, exotic plants, plus restaurants and a terrace for amazing views. Sky Garden is free to visit but you must book your 90-minute time slot at least three days in advance.
Free