To celebrate the final weekend of National Park Week, we"re at Joshua Tree National Park in southeastern California, about a three-hour drive from Los Angeles. This 1,235-square-mile stretch of land where the Mojave and Colorado Deserts converge was declared a national monument in 1936, then was redesignated a national park in 1994. That status protects a wide variety of plant and animal life, including the eponymous Joshua tree, which can be found growing mostly in the hills on the Mojave side of the park.