From Pyrgos, a road runs to the summit of Mt. Profítis Ilías (584 meters), Santorini's highest point, affording panoramic views of the island and out across the sea.

 Here stands the mighty Profitis Ilias Monastery, an 18th-century sanctuary that is open to the public.
Inside, you can see the church, with a richly carved iconostasis. 

Visit the museum displaying the miter and crozier of Patriarch Gregory V, who was hanged in Constantinople by the Turks in 1821. Also of interest are the library, the monastic archives, and the kitchen.