Deep in the bowels of London Bridge is the country's scariest attraction. This Halloween, if you want your adventures dripping with blood guts, gore and special effects, it's the only place to go. So leave the kids at home and journey into London's darkest secrets? Here's all you need to know...Where is it? Phobophobia: Terror Nights are in the world-famous haunted London Tombs. Part of the London Bridge Experience, the attraction is in Tooley Street, SE1.