Both Kaymakli and Derinkuyu offer unique experiences. Kaymakli is wider and not as deep as Derinkuyu, making it somewhat easier to navigate. It also retains more of its original artifacts, giving a better sense of how people lived. Derinkuyu is deeper and has a more extensive network of tunnels and chambers, providing a more adventurous experience. Your choice depends on what you're looking for: Kaymakli for a less physically demanding exploration, or Derinkuyu for a more in-depth underground adventure.