Location: Eternal Shores

This is a smaller post for a relatively minor location. This is one that I feel is mostly a template, because there's a lot of room to alter the basic idea depending on the circumstances. As such, it's more of an example of how I envision planes working in my setting. Again, I forgot to copy down the contributor's name of this picture.

Description:
The stones of the shore feel loose beneath your feet, but you never seem to slip or fall. The columns of stone pile up into hills and lower into valleys, as far as you can see. You can taste the ocean in the air, and see very little vegetation growing between the stones. 

Associated Knowledges:
Planes:

• You are not in the Material plane.
• There are elements - pun fully intended - of earth and water here.
• You are trapped in a juncture between the elemental planes of Earth and Water, in a limbo of sorts.

Nature:

• The powers of nature run strongly here.
• You feel more attuned to Earth and Water.
• The strength of Earth and Water here may influence magic of other types.

DM Info:
The Eternal Shores are a bridge between the elemental planes of Earth and Water. It represents a limbo between the two. Space has no real meaning there, and it is effectively infinite in the three-dimensional plane. Stone forms an endless path, while saltwater extends infinitely out. The clouds in the sky are very distant, and are in a constant state of flux. The sun is in a permanent sunset at all times. Because this plane is not fully attuned to any one element, plant life of the Material plane is able to grow there, albeit barely. 
This demi-plane is commonly traversed by powerful elemental beings. Mostly they don't have any interaction with the pathway made of earth or the ocean, but pass through it in more of a spiritual way. Creatures of the Material Plane, however, are able to get stuck there, and most times die from lack of resources. The crossing between the two elemental planes gave way to many smaller creatures being formed out of pure energy. Earth and Water elementals wander aimlessly, unable to comprehend where they are. This demi-plane is as alien to them as it is to creatures of the Material plane. Odd combinations of Earth and Water also form here - from mud elementals to creatures made of Water with Earth floating in them, to giant krakens made purely of Earth that can command the ocean. 
Some beings use this demi-plane as a hiding place. Since nobody of any importance pays it any mind, many elemental beings outcast by their superiors take refuge in the infinite expanse of the Eternal Shores. They may use it as a permanent residence, carving out their own kingdom in limbo, or as a temporary layover as they plan their next home. This leads to many elaborate lairs of evil, good, or even neutral beings that have been expelled by the elemental lords, all trying to enact their own planes. Most are unaware of the others. 
This place is mostly going to be another RP challenge for PCs. The only way a mortal can get out is by bargaining with an elemental of sufficient power to take them away. That could lead to all sorts of sell-your-soul deals being made. The environment is dangerous enough between monsters and exposure that they'd be all but forced to make a deal with something. There's enough room for different elementals with completely different goals that there will be at least one lesser evil to choose from, and enough room to work in interesting combat encounters or puzzles.