Coles Bay, Tasmania (saffire-freycinet.com.au)
Why it rules: Home of the Tasmanian devil and the cleanest air on the planet, the Freycinet Peninsula, with its sweeping views of the Hazards (a pink-granite mountain range), makes for the ultimate spa setting.
Local flavor: Try the Sapphire Ritual ($420), which is performed on a Daintree-wood treatment table sourced from the Australian rain forest. We're not exactly sure how a blue topaz balanced on your forehead serves to "stabilize your energy field," but we're interested, and the locally mined, sapphire-dust-infused facial, which aims to restore luminosity and tighten pores, sounds promising and so luxe.
DIY: Saffire Feycinet Mineral Bath Pure and Natural, $30; Saffire Feycinet Body Crème with Pure Blue Sapphire Dust, $45.
Los Angeles, California (hotelbelair.com)
Why it rules: This Spanish-mission-style hotel — nestled in the rustic canyons of L.A. — recently reopened with a whopping $100 million, two-year renovation and a brand-new spa that marries intricate design (think hand-painted murals and a chic black-Swarovski-crystal reception desk) with serene garden-side treatment rooms. The specialty of the house? High-tech Swiss skincare coveted by the likes of Emily Blunt and Zoe Saldana.
Local flavor: Treat your used and abused paws better than you normally do with an indulgent Illuminating Manicure and Pedicure ($80 and $120, respectively). The facial for your hands and feet begins with a gentle (yet effective) exfoliation care of a beta hydroxy acid peel. And just when you thought your skin couldn't get any smoother, a rich microdermabrasion cream infused with diamonds, freshwater pearls, and quartz crystals buffs away another layer to reveal a serious glow. End with a lavish massage application of La Prairie's good-enough-to-eat white caviar soufflé, which plumps skin and targets age spots. Afterward, cool your baby-soft heels — and hands — on the spa's private outdoor patio, complete with a lush wall of greenery and a waterfall.
DIY: La Prairie White Caviar Illuminating Hand Cream SPF 15, $150; La Prairie White Caviar Spot Treatment, $150. La Prairie Cellular 3-Minute Peel, $200; La Prairie Cellular Microdermabrasion Cream, $255.
DIY: La Prairie Cellular 3-Minute Peel, $200; La Prairie Cellular Microdermabrasion Cream, $255.
Virgin Gorda, British Virgin Islands (rosewoodhotels.com/en/littledixbay)
Why it rules: We'd happily chillax in the infinity pools overlooking this Caribbean paradise, nestled on a high cliff and surrounded by white-sand beaches and tranquil turquoise seas.
Local flavor: The Caribbean Breeze body treatment ($180) uses a pineapple-papaya enzyme scrub to exfoliate, a ginger body wrap to nourish, and warm coconut oil to hydrate. Sip on a fresh coconut for the full island effect.
Prague, Czech Republic (mandarinoriental.com/prague)
Why it rules: It's the only spa in the world located in a former Renaissance monastery, yet is within proximity to pubs boasting Czech national treasure Pilsner Urquell.
Local flavor: The Linden Embrace treatment ($203), inspired by the healing linden tree, helps to "adjust your equilibrium" — aka relax you — via essential oils applied through heated poultices that are kneaded into tired muscles. Then a warm-blanket wrap and scalp massage lull you to sleep.
Tabanan, Bali (alilavillassoori.com)
Why it rules: The backdrop couldn't be more perfect for a spiritual sanctuary — we're talking black-sand beaches and terraced rice paddies against picturesque Mount Batukaru.
Local flavor: If you love a head massage — and who doesn't? — opt for the hour-long, traditional Balinese Cream Bath treatment ($98), during which essential oils are decadently plied into the scalp. Rosemary and honey hydrate, mint and tea tree help eliminate flakes, and, finally, a pressure-point massage stimulates the scalp (and, some say, hair growth).
Miami, Florida (delano-hotel.com)
Why it rules: The elegant rooftop haven provides 360-degree views of South Beach, and is just a short stroll to shopping and waterfront-dining mecca Ocean Drive.
Local flavor: The Indian-inspired KeSARI Saffron Glow Facial ($180) begins with a soothing rose-petal foot soak, followed by a traditional facial that combines Indian clay, kokum butter made from Indian mangosteens, aloe, and handpicked saffron, said to induce a radiant glow.
Cape Town, South Africa (capetown.oneandonlyresorts.com)
Why it rules: After catching a wave on the city's local swells or a "strenuous" day at the vineyards, throw your feet up at this sophisticated resort set in the heart of the city on the fashionable Victoria and Alfred Waterfront.
Local flavor: The Bushmen of Cape Peninsula inspired the indigenous signature treatment, the Essence of Earth and Ocean Experience ($182), which utilizes nourishing oil pressed from the fruit of the baobab tree for massage and a detoxifying South African seaweed wrap, followed by a serving of calming English tea made from the antioxidant-rich South African herb rooibos.
New York City (trumphotelcollection.com)
Why it rules: Trump's trendy, modern digs in the heart of NYC's Soho mixes the old and new by featuring the ancient-bathing and water-pouring rituals of Morocco and Turkey, complete with a glamorous, ornately mosaicked hammam fit for an ancient Eurasian palace.
Local flavor: In the Moroccan Hammam treatment ($195), black soap whipped up with raw olives is used in tandem with a kessa mitt for a full-body exfoliation, after which Ghassoul clay, mined from beneath the fertile Atlas Mountains of eastern Morocco, is applied for detoxification and increased skin clarity.