The pavilion's days as an entertainment venue were not entirely over, however. A few months before the theatre closed, a new attraction opened in the basement. The huge basement area (originally built as the country's largest indoor swimming pool back in 1886 but which closed shortly afterwards due to problems with water quality) had been home over the years to a small amusement arcade called Tusons and, later, a ghost train ride and vintage car 'round the world' ride. These were all cleared out to make way for the Llandudno Dungeon, a walk through horror waxworks exhibition, featuring scenes from the more gruesome aspects of human history, all built at a cost of over £100,000. Scenes depicted included a full size replica of a Victorian London street, complete with Sweeney Todd's barber shop and opium den, the 1665 Great Plague of London, body snatchers at work and a full size model of a guillotine. This novel attraction proved successful for a few years but closed at the end of 1990, when the entire exhibition was sold and shipped to France. For the first time in over a hundred years, the entire pavilion stood empty and unused.