Mentioned by London 5 days itinerary
A Week in England: The Best 5 Day London Itinerary
"For a building still significant but just a bit (okay, a lot!) older, walk right across the River Thames to the Tower of London, which, having been founded in 1066, is nearly 1,000 years old!. Tours include exploring several different parts of the property – my favorite part of the tour during my visit was checking out the Crown Jewels of the United Kingdom!"