Where is Vermilion Cliffs National Monument?
This stunning sandstone landscape is one of many unusual geologic formations found in northern Arizona. Ancient layers of sandstone were eroded over millions of years by wind and water, creating 3,000-foot cliffs, slot canyons, and strange rock formations. There are no paved roads, so you need four-wheel drive to get through the terrain. A lottery system determines which hikers are permitted to trek through each day.
The correct answer is Arizona.