6 Jewel Cave National Monument Spectacular Located in a scenic ponderosa pine forest, this 1,279-acre park is a peaceful retreat for hiking, birdwatching and viewing colorful wildflowers. However, its most spectacular sight lies deep beneath the surface. Discover Jewel Cave, the third-longest cave in the world, which boasts more than 202 miles of mapped passageways as well as illuminated caverns, glittering dogtooth spar crystals, textured “cave popcorn” and ceilings dripping with stalactites. >> EAT & DRINK Take your pick from delicious restaurants in Custer. Fill up on a classic diner-style breakfast surrounded by vintage kitsch at Our Place . Or opt for seasonal, Scandinavian-inspired breakfast at HJEM A.M. For lunch, The Custer Wolf Food & Drink offers gourmet comfort food — everything from a walleye po’ boy made with locally caught fish to a creamy BLT alfredo pasta. Catch live music at Custer Beacon , where they serve sandwiches, salads and flame-grilled steak. Nearby Towns: Custer (12.5 miles) 10 // #HiFromSD