The London Pass can be called the London Tourist Card. After purchasing this ticket, you can enter 60 scenic spots, take the London Tourist Bus, take the Thames River Tourist Boat and so on. A card can be divided into one day, two days, three days, six days and ten days. It can be chosen according to its own itinerary and tour arrangement. Generally speaking, the longer the time, the cheaper the fare is, and the higher the performance-price ratio is. Personally, I don't think I need to buy a card for a day trip, because I can't go to many places in a day, so I'd better buy tickets directly. Three-day tickets are more suitable. It's worth visiting several representative attractions such as Windsor Castle, Tower Bridge, Westminster Abbey and Kensington Palace.