The sanctuary of Leto called the Letoon (Λητῶον), sometimes Latinized as Letoum, near Xanthos, was one of the most important religious centers of the Lycian region in Anatolia. The site is located between the towns of Kaş and Fethiye in Antalya province of Turkey, approximately four km south of Xanthos along the Xanthos River. Archaeological finds at the site, which was never a fully-occupied settlement, but remained essentially a religious centre, date back to the late sixth century BCE, before the Greek cultural hegemony in Lycia, which began in the early fourth century. In earlier times, the site was probably already sacred to the cult of an earlier mother goddess— she is Eni Mahanahi in Lycia— which was superseded by the worship of Leto, joined by her twin offspring.

To write captions I used On the Lycian way, a book sold in museums in the area, published by Uranus, publishing. Some captions need to be written yet.