Just off I-90, you'll find the legendary Wall Drug, a sprawling and wonderfully quirky roadside stop that's been a traveler's oasis since 1931. What started with the simple promise of free ice water has blossomed into a 76,000-square-foot emporium of fun. You can wander through the Western Art Gallery Restaurant, grab their famous homemade donuts and 5-cent coffee, and explore a maze of unique shops. It's the perfect place to stretch your legs and soak up some classic Americana on your way to or from the Badlands.