Hotel Arts Barcelona is giving guests the chance to explore Spain’s Costa Brava and nearby villages in their choice of a 1986 Rolls-Royce Corniche II Cabrio, a 1958 Rolls-Royce Silver Cloud II, a 1963 Bentley S3 Continental, or a 1959 Cadillac Series 62 Cabrio. Guests who book the hotel’s Vintage Car Excursions (from about $1,100 for a half-day) will be picked up in their chosen car and taken on a chauffeur-driven tour of, for instance, the hills of Mount Collserola, where they can visit the famous Labyrinth o…