It's an example of creativity, as opposed to facts, so that it can be copyright.
Review of some commercial satellite imagery shows a salt pan.

It is a festival area. Some kind of music festival if I remember right. But I don't know how it is called.

It's the Burning Man Festival

http://en.wikipedia.org/wiki/Burning_Man

A fine example of local, timely mapping at it's best - zoom in to see the glorious detail. Done by the recipient of an OpenStreetMap North Star :)

osm.wiki/index.php/User:Mikel

Good evening sir,
you discovered a hidden UFO site.
This way please...

It's Black Rock City, NV. The birthplace of the online virtual world Second Life and about as close to SL as you're going to get in real life.

http://en.wikipedia.org/wiki/Burning_Man

Why doesn't this match the aerial? Do they move it slightly every year?

Thanks guys! Now I know... @NE2, no idea. @HannesHH They're coming to take me away, haha.

yes, NE2, it moves rom year toyear.