The UX (short for Urban eXperiment) is an underground organization of Urban explorers that improves hidden corners of Paris. Their work includes restoring the Panthéon clock,[1] building a cinema — complete with a bar and a restaurant — in a section of the Paris Catacombs underneath the Trocadéro, restoring medieval crypts, and staging plays and readings in monuments after dark. The group's membership is largely secret, but its spokespeople include Lazar Kunstmann.