The London Dungeon is a fun, if not somewhat frightening, way to learn about some of the more macabre chapters from London’s history. Ticket holders will find a cast of charismatic characters on hand to guide them through the 90-minute experience. Because of the attraction’s popularity, it’s a good idea to purchase a ticket in advance, thus avoiding waiting in line or potentially being assigned a slot much later in the day. A London Dungeon entrance ticket can be combined with a Thames River hop-on hop-off cruise, which stops at several locations along the waterfront, including Westminster Pier, Tower Pier, Greenwich Pier, and the London Eye Pier.