Gott’s Roadside, St. Helena, CA (pictured).
Not South Beach. Not the Zone. No diet plan encourages the consumption of thick, rich, two-full-glasses’-worth-in-the-metal-canister milkshakes. But you’re on vacation, remember? You don’t care. Which is why, when you hit a truly great milkshake stop like Gott’s, you proudly order an Espresso Bean shake with added Oreos. And, no, you don’t share. $; 933 Main St.; 707/963-3486
Big Dipper, Missoula, MT. Classic shake shack atmosphere, down to the star-studded Big Dipper neon sign. But the milkshake flavors veer into the intriguingly outré, like Mexican chocolate, cardamom, and chai. $; 631 S. Higgins Ave.; 406/543-5722. Also in Helena: 58 N. Last Chance Gulch; 406/513-1051.