Cretea is located in a forgotten part of the sea. Its population consists of a mixture of Fae, Half-Fae, and Mortals. Both live there in harmony, according to Miryam and Drakon's morals. The island is protected by magic, and only a few people know about it, including the Inner Circle.
A Court of Wings and Ruin
With war against Hybern inevitable, Rhysand sought out Miryam and Drakon in hopes of gaining their aid, and sizable troops of Seraphim, magical warriors with angel-like wings. However, their island, Cretea, contained nothing but old ruins, Indicating that they might have fled upon hearing that Jurian was attempting to hunt down Miryam.
During the last battle with Hybern, Miryam and Drakon showed up to come to the aid of the other courts. It was revealed that the "ruins" seen on their island were nothing but a ruse to keep out unwanted enemies, but the magical wards worked too well, as they prevented their friends from finding them as well. Throughout that time, Miryam and Drakon were in fact safe and sound. Along with the Seraphim warriors and a team of mortals that they had encountered, they successfully defeated Hybern's army.