See the best of London and beyond with top-rated tours and excursions on Viator. Explore the Tower of London and the Crown Jewels, join a day trip to Stonehenge, Windsor Castle and Bath or Oxford, or take a guided tour of Buckingham Palace, Big Ben and Westminster Abbey. The Stonehenge day trip is rated 4.6 by over 21,000 travelers, and every tour includes free cancellation. Prices start from just $52 per person.