Around the Horn, Virgin River - Utah
Hiking through the 'Narrows' of Zion's Virgin River canyon is such an experience. You hike partly in the river, and partly across sections of deep sand and water-polished boulders. The day long trip up through 'Wall Street' is a mandatory hike when visiting the park. Soaring orange sandstone walls, the sound of rushing water, the ribbon of a deep blue sky, and an otherworldly sense of being 'inside' the mountain make this so much more than just a day hike.