Hi Paul,
I think they have established the national park around the most spectacular area. The place has exceptionally high number of volcanic cones with bright red colors next to each other. You can hike other locations but they are less spectacular. In fact I will show one such hike later.
Inside the park they mention as well the camel ride which does not allow you to see anything really. There are also some organized walks. Two routes which you need to prebook well in advance but they are restricted to people over 16 years old so not for children.
M