
The ancient site of Hierapolis was a Roman spa. "Hierapolis, foremost land of broad Asia, mistress of the Nymphs, adorned with streams of water and all beauty." Romans came to Hierapolis to bathe in the hot springs for their healing properties, and worship at the Temple of Apollo.
Roman main street - Once you enter the ruins, the first thing kids will see is a wide main street, which runs north-south, the length of the ruins. Head left towards the North City Gate, into the Colonnaded Street paved with stones, until you reach the big triple arch, Domitian's Gate.
Necropolis - Continue a little farther to the north Necropolis, where people were buried - there's over a thousand tombs here. Looted long ago by tomb robbers (despite inscriptions warning them off), it's fun to wander among the tombs, all different shapes and sizes, and some are roomy enough you can go inside.
Theater - Back the other direction, go east past the Temple of Apollo and the hissing cave of the Plutonium (where originally people could ask questions of the oracle of Pluto, now covered with a grate) to the huge Roman theater. Plays and water shows were performed in the large open amphitheater that could hold an audience of 10,000 or more. The theater is in good shape as it's been restored, and performances are produced here in the summer.