London Pass Including Hop-On Hop-Off Tour. Discover London’s top sights for one low price with the London Pass. Choose a 1-, 2-, 3- or 6-day pass, and enjoy free entrance to more than 60 attractions including Kensington Palace and London Zoo, plus skip-the-line access to must-sees such as Westminster Abbey and the Tower of London. Your London sightseeing pass also includes a hop-on hop-off bus ticket and valuable shopping and dining discounts. Plus, upgrade to a London Pass with travel for unlimited use of the London Underground, buses and more, and make your sightseeing even smoother. Book London Pass Including Hop-On Hop-Off Tour From $80.51.