(CNN) — The sun and heat are harsh in the summer, and shade is nowhere to be found. But from all over, people come to admire the otherworldly beauty of the wave-like white dunes and to hike a trail marked only by posts staked deep in the gypsum sand.
Hikers at the White Sands National Monument in New Mexico are warned about the desert conditions and advised to take many precautions. In the summer, those include drinking lots of water -- a gallon a day is recommended -- and resting frequently. Temperatures often top 100 degrees.