The Shattered Oceans
The Shattered Oceans is a world covered in about 85% water, and divided up into three Tripartites: the North, the Center, and the South, all with major continents. There are two suns in the sky that world mythos and history has named Calypso and Karna, and two moons named Pasiphae and Erebus. These celestial bodies keep the world turning on a week long day and night cycle.
There are hundreds of islands throughout the world. The flora and fauna of the world, both on islands and continents, has been allowed to grow and develop so that some of the forests and creatures are much larger than normal, the herbs and potions more potent, and the natural world more wild. Cults exist in the world that worship the Suns and Moons respectively but respect the other's place in this world and the way they balance each other.
The Northern continent is called The Tear of Pasiphae, the continent in the Central Tripartite is called Andalus (home to The Rift and The Winding Woods), and the continent in the Far South is called Zimura (home to a supervolcano called the Pulsing Caldera). There are also 3 distinct types of technology that exist in the world: Kobold, Gnomish, and Goblin technologies. The Kobold are the masters of Ambush and primarily live in the North. The gnome tinkerers live in the Equator region on Andalus and make all kinds of useful trinkets and gadgets to make both daily life and adventuring easier. Their technology is also the most reliable. The Goblins are explosive experts who peddle their business in the Far South, and pride themselves on the least stable of the technologies. Each race has a Center of Distribution that is located on the major continents and serves as their primary hub for both product and storage. Technologies that may be restricted by region or population are made available through trade but are much more costly if purchase outside of their home region.
Aquatic races are very common, even the ones normally limited to the Elemental Plane of Water, as are underwater cities and societies. When encountering a village, trader, or race that does not speak Common, the world falls back on Aquan as their primary source of communication.
The world is rife with magic -- more so than our familiar friend of Abeir-Toril. In fact it's a vital part of the economy. Mages and their services are regarded as an essential to the day to day functions of The Shattered Oceans and highly respected by the majority of society.
The world has unique forms of magic: Chronomancy, Hemomancy, and Gastromancy, with their own guilds, cults, and schools of magic. Chronomancy is a magic developed in ancient times by gnomes. It has been subject to very heavy scrutiny and even banned in some townships and cities because of the negative connotations associated with its users, though the gnomes never intended it as anything more than a way to hop back in time and perfect their inventions. Hemomancy was developed by Drow and is regarded as one of the dark arts: an essential part of magic but one that has some fear associated with the name. They make very skilled nurses and doctors but few hemomancers feel inclined to take up such a noble profession, preferring the roles of assassins and interrogators. Gastromancers are the most experimental school of magic and many do not take them seriously. While adventurers love their enchanted treats and fun familiars, many skilled mages regard Gastromnancy as a form of play magic and laugh at the thought of it being considered a school of magic.