A cross between creativity, horror, and adventure, Dwell aims to be an ORPG like no other. Settle, create a village, and defend your friends from the horrible creatures who lurk in the forests. You can change the landscape, farm, or hunt in order to survive the conditions-- it's all up to you.
The end of the world is host to a few caves.
First thing I think of: Reyn Khuprus from the Rain Wilds Trilogy.
Abandoned city (it looks like it), River, edge of the world...