From mid-May to the end of October, this gigantic indoor maze at the far eastern end of Vieux-Port entices children to come and explore a mystery, which changes each year. One year, for instance, the maze was set up like the interior of a castle, with a tale of a priceless black-diamond family treasure; another year, visitors searched throughout the maze for information to open a safe that contained stolen art works. You'll climb through rope bridges, take staircases to secret corridors, wind through walls of enormous oil drums, and slide down chutes, answering math or logic questions along the way. It takes about 90 minutes to get through. A lot of it is dark, and there's some crawling involved, so be prepared.