The Seelie Kingdom's capital. It is the best place to be for the Lughnasadh festival. The palace is at the top of the city, which is built on a lush bank leading down to the sea.
From The Books:
Below sprawled a city unlike any city I'd ever seen in the human world. Instead of the gray of cement and steel, Rahivea was lush and green with buildings of pale wood or white stone wrapped around enormous trees. Nearly all the rooftops were green, some with neat gardens and some with sprawling vines or wildflowers.