Serendipity Wellness Spa - Frankenmuth Share: Day Spas Serendipity Wellness Spa - Frankenmuth Visit Website 925 South Main Street Frankenmuth, MI 48734 (989) 652-6117 About Map About Sit down. Relax. Serendipity Day Spa will take care of the rest at its full-service salon. Anything you need under one roof, located in Linden, MI. What's Nearby? Distance: 5 10 15 20 25 50 mi.