"Hands-down one of our favorite places to stay in London, the Connaught in Mayfair manages to strike a balance between charming and yet totally modern. The hotel's 5,000-square-foot spa (the only Aman Spa of its kind outside of the resort group), is just as incredible as you'd imagine swathed in floor-to-ceiling marble. At just five treatment rooms strong, there's a welcome intimacy here—all treatments start with an herbal infusion to help you unwind and then treatments take from Chinese, Indian, and Thai influences. (Each of the treatment rooms has its own private steam room.) During the week, the spa hosts a 20-minute lunch meditation at 1 p.m. that's free and open to the public. "