As BraytonHughes notes on their website, “...surfaces in the spa that appear like rocks that have been abstracted and sliced from a boulder....”  Photo 6 of 7 in One Night in a Five-Star Resort at the Center of Big Sky’s Transformation

One Night in a Five-Star Resort at the Center of Big Sky’s Transformation

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The luxury hotel’s website describes the 10,000-square-foot Spa Montage as "alpine-inspired."