The Kiyashe Peninsula (pronounced key-AH-she) is a karstic landscape in southwestern Brightmarch. Caves, sinkholes, cenotes, springs, canyons, and other eroded features are common throughout the area. In some places on the surface, unusual rock formations abruptly jut out of the ground amongst the forests and grasslands of the region. This rough terrain has discouraged most surface dwellers from establishing communities in the region - the large number of predators, especially raptorial dinosaurs, that thrive in Kiyashe is certainly another factor.
Underground, the cenotes and caves of Kiyashe host rich biospheres of their own. Plants, animals, and magical creatures that have adapted to life without ever touching the surface thrive in the underground networks. Even the open cenotes, exposed to the surface above, have highly unique fauna. In some places, surface creatures that have fallen into one of the region's many sinkholes have found niches of their own. The deepest and widest of the sinkholes are sometimes even home to large subsurface forests.
There are no major rivers or bodies of water in Kiyashe, as the porous rock of the area allows almost all of the water to drain into the subsurface reservoirs.