Penthouse, The Mansion, London

This duplex apartment is one of just two penthouses topping the new development by Clivedale London, and the only one still available. Positioned amid a cluster of low-level historic buildings, this new residence is a rare find at the point where Marylebone and Mayfair meet. Thanks to this prestigious location, the three-bedroom residence offers uninterrupted views to the west, which you can gaze at from your private balcony. Arney Fender Katsalidis, the design firm behind the interiors, fitted this light-flooded, 2,307-sq-ft residence with oak, marble and white corian. You’ll have access to a cozy wood-and-leather residents’ lounge that looks onto a sunken garden, and a mosaic-tiled wellness area with 82-ft pool, sauna, steam room, state-of-the-art gym and treatment room. This all leads off the dramatic travertine-lined, double-height lobby. The 23 residences come with 24-hour concierge service, valet parking and use of a chauffeur-driven Bentley.