League of Extraordinary Gentlemen Wiki

Megapatagonia as seen in Heart of Ice

Megapatagonia is an archipelago in the Antarctic, and is by extension part of the Blazing World.

The archipelago is similar to the Blazing World in that it features similar architecture, is "half-real" and is ruled over by talking beasts. 

Megapatagonia's culture is a mirror of France's, down to its capital 'Sirap'. For this reason, and because of its beast-man populace, we see the talking French dog, Dogtanian, when Janni passes through Megapatagonia on her way to the Mountains of Madness in 1925.