Beneath Sir Christopher Wren's enlightened buildings, tunnels and dungeons from older constructions still remain, haunted by the spirits of ancient admirals and drowned mariners. Be prepared for chilling encounters from history as you join your guides on an expedition into this labyrinth. After these harrowing events, share your experiences as you enjoy a ghoulish cocktail in the bar. Not suitable for under 16 year olds. Proof of age may be required for the pay bar. Costume is encouraged. Tours start at 7pm, but you need to arrive by 6pm in order to register at the Queen Mary Undercroft bar before tours begin.