Pamukkale (Hierapolis) map
Once you enter the site you are tempted to wander around by your own, but it's better to have at least a map of Hierapolis in order to be sure that you'll not miss the important parts.
In any case there is a board with a map located near the western entrace which helps you identify better the ancient buildings.

Pamukkale bus time table
Dry (for now) west terraces, till the re-diversion
Hierapolis
Natural hot spa