Given that it’s attached to one of London’s most fashionable hotels, it’s no surprise that The Berkeley Heath Club and Spa is plenty chic. The décor is much more subdued than the hotel’s, but the spa is undeniably stylish. The bi-level spa features a beautiful Mediterranean style terrace with a pool to take advantage of those select sunny London days. But the real relaxation can be found on the lower level in the treatment rooms. With a spa menu ranging from a lava shell massage to a mineral-rich wrap using mud from Monticelli, Italy, the Knightsbridge spa is a great place to unwind and recharge.