Concierge.com's insider take:
Recently dropping "Hilton" from its name as part of its Waldorf-Astoria Collection rebranding, this 1960s classic on lofty Monte Mario may be a fair hike from the sights (a 20-minute taxi ride to the Vatican, for instance), but there's regular shuttle-bus service, and the payback is the amazing view over the centro storico—plus the city's largest hotel pool, attached to a huge spa and fitness center. The 370 rooms are lushly decorated, all with balconies, and even the standard Deluxe doubles feel spacious. But for the full luxury experience, check into one of the 25 suites, or any of the Imperial Rooms on the top two floors; the latter feature more opulent decor, choicer fabrics, a dedicated Imperial Club bar and breakfast room, and even a separate elevator, which whisks guests straight up past the plebs—and as you'd expect, the penthouse is pretty spectacular, too, with some of the best views in the city. The owner, Angelo Guido Terruzzi, is an art collector, and many of his purchases are scattered around the hotel. They include a cycle of paintings by Tiepolo in the lobby, for which Terruzzi paid $8 million in May 2006. The eighth floor hosts La Pergola restaurant, fiefdom of German super-chef Heinz Beck.