The great thing about London in winter is that you pretty much have the entire city to yourself -- hardly any tourists, no crowds, you can get a table at a pub and take some great photos without jostling for vantage points! We've hosted and played tour guide for four visiting American friends in the past two weeks. Winter is the perfect time to visit London. Not to mention that airfare is dirt cheap right now. Tickets from Washington or NYC are running about $450 ROUNDTRIP!