The Sierra Nevada offers us this altitude in stages, starting with its ski lifts, which operate even in summer, for the sole purpose of taking us on a journey into the azure blue of the sky, suspended in space to better discover its unique 360° panorama.
But for some of us, the summits aren't enough. And that's just as well, because the United States is very keen on helicopter and aeroplane tours. Lake Tahoe even boasts a hot-air balloon, the only one of its kind in the world, which takes off from the middle of the lake and then returns.