ONE L.A. The Four Seasons Penthouse. Hands down, the city’s best penthouse, One L.A. is an elevated retreat set 12 stories above the city. Spanning nearly 13,000 square feet over two levels, this spectacular residence can be customized to its owners’ preferences. Its picture-perfect, roughly 6,000-square-foot rooftop terrace features a swimmer’s pool, two reflecting pools and soaring 360° degree views that capture Beverly Hills, the Downtown skyline, surrounding city lights, stars, sunrises, sunsets, the Pacific Ocean and beyond.