No visit to London would be complete without a visit to the iconic Tower of London. Originally built in the 1070s by William the Conquerer, it was the first stone castle in England, and has been expanded and revised numerous times over nine hundred years. Today, it serves largely as a tourist attraction, and as secure storage for the Crown Jewels. We arrived early for our ticketed entrance time of 11am, and wound our way slowly inward following a queue of hundreds of other visitors. The Tower (really, several towers surrounded by concentric defensive walls and a moat, now dry) was decorated for Christmas and thronged with holiday visitors.

with The Shard visible in the distance at right.