The park may technically belong to the queen, but guests at the MANDARIN ORIENTAL in London can make it theirs, at least for an afternoon. The hotel, which has a private entrance to the park, offers a picnic lunch and tea with butler service during the spring and summer months. A uniformed footman takes care of everything—toting the wicker basket, spreading out the starched white linen, then reappearing to tidy up. Picnic, $185-$215 per person; 866-526-6567; www.mandarinoriental.com.
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