Behind unassuming doors and just a few steps away from buzzing inner-city streets, London offers a truly mind-boggling wealth of places to explore. This is the ultimate guide to London's hidden gems and unexpected delights. Think you know London? Think again. Behind unassuming doors and just a few steps away from buzzing inner-city streets, London offers a truly mind-boggling wealth of places to explore - from hidden rooftop courtyards and Roman ruins to eerie foot tunnels beneath the Thames and clandestine cocktail bars. Whether it's a 100-year-old underground postal railway you're after, or a token-operated book vending machine, this book will guide you down the city's most unexpected avenues. Simply slide open the trick bookcase and step into your new favorite London haunt.