Winter or summer, when the mountains are calling, we must go — and happily, the options for getting away are endless. There’s no need to settle on a run-of-the-mill cabin or campsite when sites like Airbnb and Vrbo are filled with unique options, from ultra-modern wilderness crash pads to domes, castles, and train cars. We’ve tracked down some of the most eye-popping places you can stay in or near the mountains across the country. Here are our favorites.