If you have ancestors who lived in London, you will find Collage, The London Picture Archive, a gorgeous look into your family history.
It took two years to digitize more than 250,000 images and maps. The result is a gorgeous site that will amaze and delight. There’s an impressive search component, but the best way to begin is to scroll down the site’s home page to the featured galleries and further down to the subject browsing area. After spending some time wandering through the many collections available, you’ll have a better idea how to search for specific locations or historical periods.
Be warned! It’s going to be hard to stay focused. There’s so much to see that it is too easy to get distracted.