Sierra
an excerpt

Usually, the Elemental Regions didn’t mingle. It was an opposites issue. Earth clashed with Air, Fire with Water, and Light with Dark. The powers that be wisely decided that it was best to keep everyone apart, which is why the elements were all separated into regions. Once a year, however, there was a Union on one large island, equipped with all things necessary for each Region to stay, if only for that one day. A vast ocean surrounded the island, and there were hot spots dotting every inch of it. Strong air currents circled around mountains and forests. There were caves, barren patches of wasteland and sparkling areas of greenery and clear ponds.

All of these different areas on the island led into each other, blending meadow with desert, clear blue sky with clumps of storms. True, some opposites clashed, and under normal circumstances, war would erupt between them right then and there. But on the yearly Union, even those of Light and those of Dark would pass each other by, acknowledging each other with a silent understanding.

One clash of opposites, one pleasant Union, was recorded in the History of Regions as the most mysterious and unprecedented meeting to ever take place. High on a mountain, the Union Island’s tallest peak, it was said that the heavenly tune of a songbird was heard, and then seen floating to the ears of a fox.

High on that mountain peak, a woman of the Air Region sang her song of love to a man of the Earth Region.

Though a long introduction, this all was absolutely necessary to explain how Sierra came to be.