Illanysh

Underground system of caverns and caves that also serves as the Gnome homeland. The surface of the nation of Illanysh is completely covered in sharp jagged hills and mountains, and is very nearly inhabitable by any race other than the Dwarves that build their settlements into the sides of these mountains, and various races of monsters that do not mind sharp jagged mountain sides and the thin air up on the mountain peaks that completely cover this nation.

Under these nearly inhabitable jagged peaks is a gigantic series of caves, caverns, and halls that have been civilized by the Gnomes to create a massive series of settlements, lit and powered by the technologies that they create and improve on constantly due to their scientific curiosity and need to increase their knowledge of science and technology.

Refram
The center of Gnomish intellectual and scientific advancement.

Talisan
The center of Gnomish Mystical and alchemical advancement.

Synapsis
A long abandoned laboratory use for project Synapse. All tunnels leading to this large laboratory have since then been destroyed and the lab has been powered down for many generations. All that said, rumor is that the gnome experimenters left the lab in such a state that if someone else found it and had the technical knowhow, they could get the experiment back up and running in a matter of weeks.