Okay, so for these, the Original image is 4900px X 3500px. So, the one I placed a grid on that is 70px X 70px in size, which adds to 70 by 50 Square grid.
The second one, I placed a grid of 140px X 140px in size, which adds to 35 by 25 Square grid.

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Name:	IceCavern_70x70.jpeg 
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Click image for larger version. 

Name:	IceCavern_140x140.jpeg 
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Size:	2.50 MB 
ID:	115103

What would be better in your opinion? (I really do not know what kind of monsters to add to the maps, yet. I will have to have a better understanding on how to DM if I would do that. So, for now it is maps, lore and maybe objects that I will add to them.)