Here’s where you can take in some of the world’s most spectacular beauty.
1. Alice Lake, Stanley, Idaho
This alpine lake is one of the largest in the Sawtooth Wilderness of Idaho, a federally protected swath of wilderness that, according to the Environmental Protection Agency (EPA) has some of the clearest air in the lower 48 states.
Along with a glassy body of water, visitors who hike to the lake can take in cliff views, cross several streams and gaze at a gorgeous waterfall.