Bring your swimsuit and leave the afternoon open. Canyon Ranch SpaClub is the type of spa with enough amenities to keep you busy without ever booking a treatment. The sprawling spa on the fourth floor of The Venetian and the third floor of The Palazzo packs a punch with more than 120 services and activities, and a European thermal experience.

Clocking in at 134,000 square feet, the spa’s big attraction is the Aquavana, a hot and cold wonderland of experiences that you’ll want to devote time to exploring. The crystal steam room offers aromatic essential oils, refracted lights and a quartz crystal to enhance this relaxing moist heat. Step into the experiential rains to cool off with three different showers that mimic Atlantic storms, polar mists or a Caribbean monsoon. Relax in the herbal laconium with humidity that wafts over you or go super cool with the Igloo, with twinkling lights and, yes, snow. Other amenities here include a Finnish sauna with a dry heat and hydro spas with body jets for massage. Couples can relax in the salt grotto, with heated benches and sea air, or go for a more meditative experience in the wave room, with reclining chairs and a ceiling that moves to waves with sound effects to match.

Anyone can book a SpaClub day passport for $40 to experience the Aquavana and take advantage of fitness classes and wellness programs for an additional $25. Those who can tear themselves away from this relaxation haven to try a treatment should add the Ultra Nourishing Cocoon, a 100-minute service that uses coconut milk and honey products to renew skin for spring. This refresher includes a sugar scrub exfoliation, followed by a wrap in the warm envelope bed and a massage to finish. Divine.

The Venetian and The Palazzo, 6 a.m.-8 p.m. daily. 702.414.3600