The Mojave Wasteland is a large stretch of desert not as horrendously scarred as the rest of America. As such, it's land scape is considered some what of a break from the radioactive dusts of other parts of the country. But it is no less dangerous, for it has many types of mutated creatures and tribals raiders alike.
But perhaps the most unique feature of the Mojave is it's Pure water Lake, covetted by many and seen by few. It also has the Hoover-Dam, and ancient prewar construction capable of powering several pre-war states with electricity. Also, the ruins and preserved parts of Las Vegas, redubeed New vegas, serve as a major attraction to Wastelanders and NCR citizens alike.