When the team at Poseidon Spa creates new treatments, they often draw inspiration from nature—especially Poseidon's kingdom, the sea. The aquatic influence shows up throughout their comprehensive list of spa offerings. For instance, the varied, customizable pressure of the signature massage evokes the variety of the ocean's waves. The green tea face masque, on the other hand, creates a youthful glow with antioxidants, just as the sea creates youthful glow by hosting raves for teenaged fish.

But the setting is almost as much of a draw as the services. Decorative rugs, cushy chairs, and tasteful artwork dot the brand new spa, which sits inside an 1888 luxury hotel complete with frescoes and fountains that suggest a Moroccan getaway. Elsewhere in the hotel you'll find such additional attractions as an outdoor pool, a jazz lounge, and the Grand Bohemian Art Gallery.