One of the more popular attractions in Anza-Borrego, the Slot is easy to get to (even in 2WD), an easy and short hike, and makes for great photographs. The steep walls provide some relief from the hot sun, and kids will love exploring this maze.
Anza-Borrego is the largest CA state park and has tons of its own unique features. Mainly for 4WD, offroading, and dirt biking enthusiasts, we still had a lot of fun on foot and with just 2WD. Fish Creek Is just a tiny portion of the park, but the wind caves are truly unique and offer an amazing view for sunset. Hint - if you camp at Fish Creek Primitive Campground nearby, it's free and there are fire rings and a very clean toilet.