If you are like me and love to wander around London - or any city really - I have a super tip for you, the app London Architecture Guide. I just came across it a few days ago, and I cannot stop checking it.
Created by the Architecture Foundation, the free app allows you to "Unlock the rich history of London's finest contemporary and historic architecture. Discover iconic masterpieces and hidden gems with photography and forthright commentary on over 1,100 buildings by renowned architecture critics Edward Jones and Christopher Woodward. Explore the capital's best buildings by period, type and architect with this unrivalled and intuitive tool for locals and visitors alike."