<http://schema.org/about>
"The park is far enough away from light-polluted cities that its views of the night sky offer a glimpse of what could be seen before such cities were erected."^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.mnn.com/earth-matters/wilderness-resources/stories/death-valley-named-largest-dark-sky-park>