Here is something fun I found in Mizrachi on parshas Masei. I don't have time to analyze it, or translate it, or double-check to see if the described facts match the geography of Eretz Yisrael. But there are a series of psukim in perek 34 describing the borders of Eretz Yisrael, and Rashi explains them. Thus, it begins:
but it continues from there.
Mizrachi explains what Rashi means, but to help things along he gives us a very nice map.
You might want to click on the link above to see the map at JNUL, where you can zoom in and see the features for yourself.
Is there anything of interest here? I don't know, but I like the map.