Lost Valley

The "Lost Valley" (part of the Lost Realms concept) was very popular with Europeans of the late 19th and early 20th century as there were still unknown lands out there. It could exist in a world with satellite mapping as an extra-dimensional location, perpetually covered in mist and fog so no truly good view can be had from space, or hidden by superscience.The superscience option is what hides Gorilla City from the rest of the DC world
These lost valleys tended to be places where long dead animals or civilizations thrived. 
==References==
*GURPS Lands Out of Time pg 32
Category:Fictional Settings