Göreme was an epicenter of early Christianity, it also featuring painted cave churches. The rupestrian churches date from the 10-11th. century and include Tokalı Kilise and El Nazar Kilise , St. Barbara , Saklı Kilise , Karanlık Kilise . .. . The otherworldly fairy chimneys are impressive. The park is a unique spot, not to be missed. Prepare for at least 2 hours of walk with a lot of matchless sights (it became a UNESCO World Heritage Site in 1985). I found also the "Dark Church" remarkable because of the way in which it preserved the beauty of the celebrated frescoes. Nevertheless, if you are not curios/passionate about the subject, it is better not to pay the additional ticket.
Prom a practical perspective, the landmark is easily to be found and has a parking There were several very commercial stores while I expected to find something authentic craft objects. A little crowded in the morning with longer waiting lines for the ticket purchase. If you feel the need for a guide, you can find an authorized one inside. We did not go with this opting (as we have done some reading prior to the visit) but there were several groups which seemed pleased with the service. There is a cafe and a museum shop inside so you can have a coffee and a drink.