The Kolymbethra garden is an archaeological site of great naturalistic and landscape relevance, located in a small valley in the heart of the Valley of the Temples in Agrigento. In 1999, the Sicilian Region entrusted it for free to the Italian Environment Fund (FAI) for a period of 25 years, putting an end to the state of abandonment it had fallen into during the last decades of the twentieth century; as a result, it has become one of the places of archaeological/naturalistic interest of great importance at both the territorial and national levels. The vegetational and structural restoration organized by FAI allows visitors to explore the Temple of Hephaestus, as well as discover some hypogea. (Entry from the Italian Wikipedia page, CC BY-SA. Location reported by the OpenStreetMap community.)
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