Bespoke Saunas
If you’re looking for that extra special sauna then there’s a guy in Canada who might be able to give it to you. Luc Beauparlant, of Création Sauna Inc., builds bespoke saunas using a variety of natural materials and styles. One was made in the form of a whales rib cage. He mainly uses cedar wood from the structure as this commonly has a natural curve which lends itself well to the style of his saunas. The Monteal Gazette has a feature and a couple of nice photos.
As for the cost - well his saunas range in price from $20,000 to $100,000 - not sure if that’s Canadian money or US. Either way - you need to start saving sooner rather than later.