Best Royal Palaces Pass: Kensington Palace, Hampton Court and Tower of London. Book in advance and jump the queue at the Tower of London, Hampton Court and Kensington Palace. Don't waste time waiting in lines on vacation! Your pass is valid for one visit to each attraction and is valid for two years. You'll have plenty of time to explore the stories and intrigues at each site at your leisure, as part of your own itinerary. Get Best Royal Palaces Pass: Kensington Palace, Hampton Court and Tower of London From $71.79.