Joshua Tree National Park
We haven't been to Joshua Tree on this trip yet. But in the meantime, here's a map showing you where it is, and a link to the official NPS website to help you plan your trip.
But, we have visted Joshua Tree before - just not on this trip to visit all the units. We've linked to that post about Joshua Tree National Park below too.
If you'd like to learn more, check out this blog post about Joshua Tree.