London's hidden landscape is explored in this book - its hills, valleys and streams. Deep below the grilles, vents and manhole covers of London's streets, a honeycomb of structures is exposed, ranging from the government's vast system of offices and tunnels under Whitehall to abandoned underground stations, majestic brick-lined lakes and Clerkenwell's network of subterranean prison cells. Above ground, the reader is guided through London's historic estates, taken down narrow alleyways and cobbled mews. The exclusive world of the City's livery companies and the gentlemen's clubs of St James is penetrated, and the rarely seen interiors and special collections are seen. Recommended walks, detailed maps and photographs complement this anecdote-filled text. Addresses and opening times of all the places open to the public are included.