Your designated pick-up and drop-off point can be any location. The underground city, which is about 40 km away, and the Ihlara valley, which is further away, are 100 km in total in one way. You are more free with the taxi meter, you do not have to pay any road fees or any extra payments. You can pause wherever you want and spend as much time as you want, it can take about 6-8 hours.