The secret garden and fountain come as a surprise to first-time visitors, but not to foodies—it has two Michelin stars. Tucked away in Mayfair, the Greenhouse's pretty dining room looks out onto the greenery. Lyon-born head chef Antonin Bonnet is an inspired master, producing first-class dishes without destroying the natural flavors of his ingredients. His skill in mixing unusual combinations shines through in dishes such as a cleverly assembled autumn salad with black olive powder, Iberico ham, and balsamic dressing, followed by roast pigeon breast with pomegranate, turnip purée, almonds, and a jus of giblets and pancetta. Vegetarians are well treated with a separate menu that's so tempting it might convert carnivores. The cheeseboard offers one of the largest selections in London; otherwise go for a rich dark chocolate and praline tart with hazelnut ice cream and a milk mousse. The wine list equals the best in London—thousands of choices, but not well priced—with rare wines a specialty, but it's also kind to less ambitious pockets.