Nowadays walking on the moon is not (yet) affordable but it is possible to try a similar experience on Earth, or at least I imagine it would be quite the same!
Mount Etna, the heart of Sicily’s Etna National Park, is the highest active volcano in Europe (3.330 meters), though its height changes when volcanic material accumulates during eruptions. In 2013, it was added to the list of UNESCO World Heritage Sites.
The latest eruption occurred in December 3rd, 2015.
It is possible to climb to the top of the vulcano, alone or with guides, but of course not into the dangerous restricted area near the active craters.
Regular shuttles run from the city of Catania up to the Sapienza Refuge (1.910 m.a.s.l.) located at the base of Etna. From the refuge a cableway runs uphill to a middle station. Here there are two options to reach the Torre del Filosofo (2.920 m.s.l.m.): jump on a track or walk.
My suggestion is to climb up by feet because the main path is not very difficult (if you follow it, which I didn’t and it took so much more time and efforts to reach the top :P) and it is definitely worth it. The walking last one hour from the middle station to the top and it will be impossible to forget the experience of crossing such a lunar landscape!