Learning to Chew, Swallow, and Shit at Viva Mayr, an Austrian Detox Spa for the Ultra Wealthy

One week at Viva Mayr, a five-star health spa and hotel on the southern shores of Lake Wörth in Austria, will set you back about $4,000—and you won’t even find a bar on the premises. And yet, you will find Russian oligarchs (or their wives, mistresses, and daughters), Vogue editors, fashion designers who dress Kate…