L’enfer is an unfinished film by Henri-Georges Clouzot. Despite an unlimited budget from Columbia Pictures—Clouzot worked with three crews and 150 technicians—the shooting was beset by severe problems: everyone suffered from the record heat during July in the Cantal region; the main actor Serge Reggiani claimed to be ill; the artificial lake below the Garabit viaduct, an important part of the location, was about to be emptied by the local authorities; then Clouzot suffered a heart attack and was hospitalised in Saint-Flour. After three weeks, the film was abandoned.