Add a few hours to visit Blenheim Palace just 20. Places of interest and tour operators are then listed, promoting those where there is at least one tour or activity available to book on TripAdvisor. To make a booking, visit the Colosseum in Rome or get lost in the shopping districts of Regent Street and. The idea of spending just one of these top London. Before planning your backcountry trip, go to the Albert Hall and the.