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A quite commercialised hot spring at temperatures of 47°C and 150 litres per second. But the location not so clear, it seems that there are just spa hotels which cater for your needs.
St. Gregory's Church / Ologos Nazianos
This is the best of the old churches within the village. It was established under Emperor Theodosius in 385 BC but rebuilt in 1835. In 1924 the Greek population were deported and it became a mosque, with the bell-tower converted to a minaret and the iconostasis turned into a mihrab. Steps in the garden lead down to a cave with a holy well. Over 30 saints are called Gregory, which means "watchful shepherd". This fellow is local boy Gregory of Nazianzus (329-390) who Hellenised the early church and developed the theory of the Holy Trinity. The church was converted into a mosque after the Turkish-Greek population exchange in 1924.
Potters Church
It is the first one reached as you descend into the valley.
Coal Church
9th-10th century
St. Ephtemios church, Church with Screen
Had been torched at some point so the interior is bare. It's from the 9th-10th century and carved into the rock.
Ilisu Hamami
A convenient hamam worth the experience, providing several cabins to enjoy and get clean with the warm waters of this hot spring. Inquire the key from the supermarket next to it. They might want to rent you the whole place, but a little bit of bargaining will get you the per person price in case there are no other people.
It has two underground churches, camel staying place (which is the only one underground caravansary in the Cappadocia) and a large agora.