From: https://en.wikipedia.org/wiki/Hesperides

In Greek mythology, the Hesperides (/hɛˈspɛrɪdiːz/; Ancient Greek: Ἑσπερίδες) was the collective name for the nymphs of the evening and golden light of sunset, and who were the "Daughters of the Evening" or "Nymphs of the West". They tend a blissful garden in a far western corner of the world, located near the Atlas mountains in North Africa at the edge of the encircling Oceanus, the world-ocean.^[1]

According to the Sicilian Greek poet Stesichorus, in his poem the "Song of Geryon", and the Greek geographer Strabo, in his book Geographika (volume III), the garden of the Hesperides is located in Tartessos, a location placed in the south of the Iberian peninsula.

The name means originating from Hesperus, the evening star Venus, equivalent to vesper.

The Garden of the Hesperides is Hera's orchard in the west, where either a single apple tree or a grove grows, producing golden apples that grant immortality when eaten. The trees were planted from the fruited branches that Gaia gave to Hera as a wedding gift when Hera accepted Zeus. The Hesperides were given the task of tending to the grove, but occasionally picked apples from it themselves. Not trusting them, Hera also placed in the garden a never-sleeping, hundred-headed dragon named Ladon as an additional safeguard. In the myth of the Judgement of Paris, it was from the Garden that Eris, Goddess of Discord, obtained the Apple of Discord, which led to the Trojan War.

In later years it was thought that the "golden apples" might have actually been oranges, a fruit unknown to Europe and the Mediterranean before the Middle Ages. Under this assumption, the Greek botanical name chosen for all citrus species was Hesperidoeidē (Ἑσπεριδοειδῆ, "hesperidoids") and even today the Greek word for the orange fruit is πορτοκαλί (Portokali)--after the country of Portugal in Iberia near where the Garden of the Hesperides grew.

The Garden of Hesperides by Ricciardo Meacci