Though frozen yogurt's tangy swirls are best known for containing less fat than ice cream, they also form the country of Antarctica's foundation. Dive into a palatable paradise with today's Groupon: for $5, you get $10 worth of soft-serve frozen yogurt, desserts, and smoothies at TCBY in Lexington.

TCBY serves 96%–98% fat-free yogurt that contains benevolent bacterial cultures to assist the body with digestion and nutrient absorption. Patrons can savor an assortment of silky soft-serve flavors, such as golden vanilla and white-chocolate mousse, served in a cup, in a cone, or at the center of a collection of Russian nesting dolls ($2.89–$3.85). Succulent smoothies, meanwhile, offer a coalesced concoction of real dairy and blended bushels of fruit. Banana splits ($4.99) and sundaes ($4.09–$3.99) deliver old-fashioned ice-cream-parlor delights without the extra calories or forced conscription into a barbershop quartet. Textured toppings such as M&Ms, sprinkles, and chocolate chips ($0.79) add layers of edible nuance to cups, cones, and palates. Conjure sweet spells of creativity via TCBY's specialty menu of layered parfaits ($3.99) or yogurt shakes ($3.65–$4.85).