The Academy of Planar Incursions is a wizardly castle/keep dedicated to research and study of the phenomenon called "planar incursions". This facility is located at the top of a very high mountain in the Rampart Ridges, southeast of Varencian and northeast of Rel Astra.
This extreme altitude of this mountain is the reason for the Academy's presence on the top. According to the Academy sages, the higher altitude leads to a thinning of the "veil" between worlds, and allows the group to study the ebb and flow of "planar" energies.
Not all of the wizards and sages assigned to the academy remain there, many travel the world looking for other weak spots in the veil, minglings, and "coterminus areas" as they like to call them.
Other researchers spend their time trying to replicate the secrets of the eldar eladrin's shifting cities, and hope someday to apply it to their academy.