Meridian

Resembling mostly Niagara Falls, Meridian is the convergence of all the Nations and Outlander Kingdoms, serving as the capital of all human civilization of the current world and the main trading hub between the Outlanders Territories/Colonies (Peoples' Commune of Outlanders (PCO)) and Inlander Nations (Meridian United Inlander Nations (MUIN)). 
  Meridian is protected within the confines of The Falls. The Inlander nation capital (The Marrow) aligns the inside caverns of the, while the Outlander center (The Essence) is a compilation of towers resting within the lake center surrounded by the crescent moon-shaped waterfall.
  Since the more frequent onslaught of tsunamis, the Outlander had commissioned the Inlanders to build a protective glass dome barrier protecting the peaks of Essence towers.
  Due to the nature of Meridian (trading hubs), this nation functions mostly as a capitalist country. Thus, there is a clear class divide between the poor and the rich. While the rich tend to own massive dwellings near the water's surface. The poor tend to leave more inwards into the caverns (the poor districts resembling more of the "Walled City".
  The main Inlander nation spans deep within the caverns of the waterfalls and the supporting fjord-like valleys.