https://en.m.wikipedia.org/wiki/Lake_Nemi

https://en.m.wikipedia.org/wiki/Diana_Nemorensis

Apollo delivered people from epidemics, yet he is also a god who could bring ill-health and deadly plague with his arrows. The invention of archery itself is credited to Apollo and his sister Artemis.

Many-Breasted Artemis. Her temple was one of the Seven Wonders of the ancient world. Ancient worship focused on the nature goddesses Isis, Ishtar, Inanna and called her Queen of Heaven. By Roman times she was called Diana.

Lake Nemi (Italian: Lago di Nemi, Latin: Nemorensis Lacus, also called Diana's Mirror, Latin: Speculum Dianae) is a small circular volcanic lake in the Lazio region of Italy 30 km (19 mi) south of Rome.

According to one of several Hellenising foundation myths, the worship of Diana at Nemi would have been instituted by Orestes, who, after killing Thoas, king in the Tauric Chersonesus (the Crimea), fled with his sister Iphigenia to Italy, bringing with him the image of the Tauric Diana hidden in a mound of sticks. After his death, the myth has it, his bones were transported from Aricia to Rome and buried in front of the Temple of Saturn, on the Capitoline slope, beside the Temple of Concord. The bloody ritual which legend ascribed to the Tauric Diana is familiar to classical readers; it was said that every stranger who landed on the shore was sacrificed on her altar, but that, when transported to Italy, the rite of human sacrifice assumed a milder form.