Huacachina

You come down the access road from Ica and the desert just opens into a green bowl. Palms, a flat sheet of jade-colored water, and a ring of pastel buildings, all of it sunk below the dunes. This is the lagoon, fed by underground springs, and the water really is that color. Quechua names for it mean roughly "the one who cries salt," which fits a sulfurous pool in the middle of dry sand. It is the only natural oasis on the American continent and the image on the 50-soles note, so locals are quietly proud of it. Walking the loop around the water takes about ten minutes. Do not swim, the water is shallow and not clean. Free, open all hours. From the lagoon's southern edge, walk away from the buildings toward the tallest sand wall behind them to reach the dunes.

