Arcadia

The shadowrealm of Arcadia is a very large shadowrealm and is home to lots of different Juxteon. Elves rule the realm, but it is also home to goblins, fairies, and other sorts of fae. There are other realms of fae, but this is the largest.
Elves built a vast wondrous city and with tech that works well with nature and it's limited resources. True the elves to "rule", they usually just tend to themselves and not bother the other races. Arcadia's entryway is located in Ireland, which the elves keep an embassy building running. In these times it isn't hard to keep it hidden, most people have just started thinking it is some new secret order or something.
Economy in Arcadia is different than on earth. They have reached a level of tech that every need is automated, so have progressed into was is called a resource economy. Simply go to the store and pick up what you need or go to the business and get the service you need. It is all automated with crystal based tech and sunlight energy. Even the goblins have this tech, which the elves help them with (to much their dismay).