Ingleside Estate

"The Spanish-style Ingleside Inn has quite the Hollywood pedigree; under the ownership of hotelier Ruth Hardy in the late 1930s into the 1940s, it was an invitation-only retreat for the likes of Marilyn Monroe, Clark Gable, Elizabeth Taylor, Marlon Brando, and even Salvador Dalí. Today, it's the adult-only counterpart to the Avalon Hotel next door, which means that all Ingleside guests have access to the sister property's more robust selection of amenities, including the Estrella Spa and a 24-hour gym. While the Ingleside Inn has its own pool—with spectacular San Jacinto Mountain views—its main attraction is the fine-dining restaurant Melvyn's, a favorite of Frank Sinatra."