By Jen Murphy
Updated March 31, 2015

Lydia Mondavi, owner of the grapeseed-based 29 Cosmetics line, will open her first spa, 29, next month at Atlanta’s Mansion on Peachtree, A Rosewood Hotel ( This spring, French skin-care company Caudalie debuts a vinothérapy spa, which will host winemaker tastings in NYC’s revamped Plaza hotel (