Khorvaire
Humans
Humans are actually not native to Khorvaire, having emigrated from the continent of Sarlona thousands of years ago. However, since then they have come to dominate the continent, both in numbers and power. Humans founded the Five Nations, and most of them still live in those areas. The largest human populations are in Aundair, Breland, Karrnath, the Lhazaar Principalities, and Thrane.
The Kingdom of Galifar spread across the areas now known as Aundair, Breland, Karrnath, Cyre/the Mournland, and Thrane, collectively known today as the Five Nations. The breakdown of the Kingdom of Galifar was what started the Last War.
Geography
Khorvaire is found in Eberron's northern hemisphere. It is bounded by the Bitter Sea to the north, the Lhazaar Sea to the east, the Barren Sea to the west, and the Thunder Sea to the south.
The landscape of Khorvaire varies greatly, from wastelands and forbidding mountains in the north to deserts and jungles in the south, with everything in between.