From Tower Bridge and Big Ben to City Hall and the Barbican, London's architecture is a rich tapestry of the city's history, defining its character and ultimately capturing the hearts of its millions of visitors, as well as residents.

In this collection of 15, two-hour walking tours from Open City, the much lauded charitable institution behind Open House Festival, you can discover the hidden secrets, incredible facts and fascinating histories behind its most celebrated buildings. Including detailed maps, photographs of the buildings and information about every talking point on the tours, the city's most respected architects and critical thinkers will guide you through why each and every building in this book matters.

Including a foreword from a prolific London architect and covering the most culturally important buildings in central London, this is a guide to London that will show how beautiful the city really is, if you take a moment to look up.