The URSO may be the hotel world’s best manifestation of “Quiet Luxury.” Conveniently located between the Chamberi neighborhood and the Chueco district, the 20th-century, neoclassical building offers 78 rooms. We recommend booking a room with a terrace, but you really can’t go wrong. A popular choice for sophisticated travelers, the URSO stays away from anything splashy, preferring to remain simple, elegant, and serene. —Jeanne Malle