I can't think of a film as visually dazzling as "The Conformist" - probably the most mesmerizing piece of work in cinema but then here's a few that might work: Polanski's "The Tenant", Visconti's "The Damned", the opening sequence of Fellini's "And The Ship Sails On" and Bertolucci's "The Spider's Strategem". Oh yeah, what about Copolla's "One From The Heart"?