The London Tombs is in a former plague pit, where visitors ‘past walls that are dripping in blood, squeeze through confined spaces and gasp in terror as you're met with spiders, snakes, ghosts, ghouls and many other horrors’. Voted UKs best scare attraction it is only suitable for older (11+) children.
London Dungeons
The London Dungeon, under the railway arched of London Bridge station, is an interactive experience using actors, special effects and 3 rides.