Casona Mukul’s 16 oceanfront villas, 23 canopy casitas, five-star restaurant and 6 private spa casitas, built to world-class standards, are tucked into 1,670 acres of untouched wilderness, flanking 4 miles of pristine white sand beach. Carefully sited to minimally impact their spectacular surroundings, the villas and casitas are being sustainably built using local materials and artisans.

In lieu of a large central spa with locker rooms, the Casona Mukul Spa will be a pod of six fully appointed private casitas designed to facilitate and enhance different treatment experiences. In The Secret Garden, Watsu will be performed amid willowy ferns and soft rainlike falling water. Guests can take sweat baths and saunas in the Moorish Hammam casita and a Vichy shower in the Rain Forest. Ancient healing practices, incorporating herbs grown on a nearby farm, will be offered in Mukul (Mayan for “secret”), light and color therapies in the Crystal Temple. The Healing Hut will bring together “the best-known therapies gathered from every corner of the world,” says spa director Angel Stewart, with scrubs, oils and lotions made from locally sourced ingredients as well as Yon-Ka and Aromapothecary products. Guests will be able to book spa casitas for à la carte services or overnight stays.

“To my knowledge, there’s no other spa like this,” Stewart says. “It’s very, very special.” guacalitodelaisla.com

Steep hills and stairs can be a workout at this sprawling resort built into a cliff overlooking San Juan Bay’s perfect crescent, but the views are well worth it. This lush complex includes two pools, two restaurants, 69 charming guest rooms (ranging from studios to spacious casas) and a newly renovated spa. Under new management, Pelican Eyes is working hard to attract upscale eco-tourists. General manager Gabriel Holt is buying lamb and goat cheese from nearby farmers for ramped-up cuisine at LaCascada and Bistro La Canoa, an open-air restaurant that may have the best view in San Juan de la Sur. Aloe and neem from the resort’s gardens are used in treatments at Casa Tranquila, the clifftop spa with postcard views of the world’s second-largest Jesus statue across the bay. pelicaneyesresort.com

Aqua is the only resort on Rendonda Bay, a magical amphitheater of white sand beach about an hour and a half west of Granada. Twenty-five secluded treetop villas, built from sustainable hardwoods and furnished by local artisans, are linked by foot bridges and environmentally sensitive paths to minimize the resort’s impact. Chef Ben Slow serves food fresh from his nearby organic farm at the beachside restaurant, and the extensive wellness service menu includes facials and scrubs made from local organic ingredients, lymphatic drainage and after-yoga massages. Daily yoga classes are held on an 1,100-square-foot palm-thatched platform overlooking the beach. aquanicaragua.com

Spa at St. Julien (above)
Boulder, Colorado
Located just steps from Boulder’s popular Pearl Street Mall, the 10,000-square-foot St. Julien spa and fitness center offers a full suite of treatments using local botanical and advanced European and Asian ingredients, a Vichy shower room and a well-curated gift shop. The Urban Oasis, which includes a 25-minute facial and a 25-minute massage, is a great lunchtime pick-me-up, and the R&R add-on allows 25 minutes of nap time followed by a wake-up ritual. stjulien.com

Ona Spa
Los Angeles
Lifestyle editor Nicole Dorsey Straff’s favorite local spa is located in the historic Spanish Kitchen building above Privé Salon on bustling Beverly Boulevard. This Balinese-inspired day-escape offers an array of health and beauty treatments from aromatherapy facials to holistic Ayurvedic treatments. The intimate couples suite has a private rooftop shower for two, and a deluxe Vichy shower provides total relaxation. onaspa.com

Blossom Spa Boutique
Austin, Texas
Located in Austin’s historic Hyde Park neighborhood, Blossom specializes in organic facials, scrubs, wraps and massages using Éminence Skin Care and locally made organic products. The only Éminence Certified Green Spa in Austin, Blossom is as environmentally conscious as its home town. The Blossom Body Scrub/Express facial, a 45-minute body polish and 30-minute facial, is a perfect lunchtime or after-work pick-me-up. blossomspaaustin.com

Milla’s Treatment Boutique
New York
Located in midtown Manhattan, OSM blogger Paulina Kajankova’s favorite spa gem offers organic and chemical-free skin care, body treatments, peaceful massages, makeup services and holistic nutrition counseling in a tranquil, friendly environment. Run with precision by Camille Thomas, Milla’s features Éminence Organics Skin Care as well as an exclusive line of handmade and organic skin care products. millastreatmentboutique.com

Hyatt Olive 8 Elaia Spa
Seattle
Located in downtown Seattle, in the progressive city’s first U.S. Green Building Council LEED-certified hotel, Elaia features signature Market Fresh treatments with ingredients sourced from the Pacific Northwest. Offering 30 treatments, from a 30-minute express facial to a 90-minute holistic massage, the spa also hosts a weekly happy hour and terrific monthly specials. Packages designed for detoxification, anti-aging, relaxation and stimulation include spa-inspired Market Fresh cuisine.
olive8.hyatt.com

Spa Vitale
San Francisco
Located in the penthouse level of the waterfront Hotel Vitale, this urban enclave includes three treatment rooms and deep outdoor soaking tubs with spectacular city and bay views. The spa offers a 10 percent discount on “weekday escape” treatments booked before 3 p.m. The 25-minute bathing ritual on the rooftop bamboo garden includes a tub infused with seasonal fresh ingredients and an herbal beverage. hotelvitale.com

Allyu Spa
Chicago
Located just minutes from Chicago’s Gold Coast, Allyu (the Quechua word for “community”) is sustainably built using reclaimed barn wood, Wisconsin field stones and natural clay plaster. Offering everything from massage and chakra balancing to body treatments and sauna therapy, the spa hosts a free lunchtime meditation on the second Wednesday of every month. allyuspa.com

Bota Bota
Montreal
Anchored at the Quays of the Old Port of Montreal, Bota Bota provides a one-of-a-kind floating spa experience on a renovated ferryboat with two saunas, a eucalyptus steam bath, outdoor whirlpool baths, terraces and a garden. Spa guests are lulled by the St. Lawrence River’s gentle movements and enchanted by unparalleled views of Old Montreal. Extensive spa and salon treatments and yoga and meditation classes are all part of the offerings. botabota.ca

Corbu Spa & Salon
Charles Hotel
Cambridge, Massachusetts
Located in lively Harvard Square, this chic and understatedly elegant spa is named for Le Corbusier, the architect who designed a building in Cambridge. The massages and facials are sublime, and a high-tech system called mySkin—invented by a Harvard scientist—addresses individual issues for customized care. corbuspa.com

Sacred Hour
Rocky River, Ohio
Located in Rocky River’s Old River Shopping Area on Cleveland’s west side (just steps from the Organic Spa Magazine offices), Sacred Hour offers facials, scrubs and massages as well as Organic Chill, Japan Spa and Hammam Spa treatments and an aromatherapy bar in a plush, serene setting. Relieve stress with the Shirodhara add-on, which involves pouring warm oil over the forehead. Staff members donate 1 percent of their earnings to local charities, and Sacred Hour matches the total amount raised for each cause. sacredhour.com

Inhabiting one of 300 or so isletas, tiny islands that the Mombacho Volcano scattered into Lake Nicaragua thousands of years ago, this full-service resort is a short boat ride from Granada. The 1-acre island holds nine low-impact Japanese-style villas (built from wood downed in Hurricane Felix), a bar and restaurant, an infinity pool, a floating yoga deck and two sublime waterside spa treatment rooms. Chef Rogelio Coello grows herbs just steps from the open-air kitchen, where he prepares the day’s catch or chicken raised on a nearby island with fresh, local produce and gives away his secrets for perfect tortillas during cooking classes. Guests can kayak on the lake, alive with egrets and herons at dawn and rowboats (archipelago dwellers’s preferred mode of transportation) as the day begins. jicarolodge.com