ABJA Spa is the day spa of Casa Velas, an adults-only all-inclusive hotel in Marina Vallarta. Spanning more than 6,500 square feet, it has a hydrotherapy circuit with a sauna, a eucalyptus-infused steam room, a pressure shower and a jacuzzi overlooking the gardens, plus a relaxation area and a gym. Treatments draw on Mexican tradition and herbs from the hotel's own botanical garden.