I just finished a large print of beautiful Norfork Lake, which is located in Arkansas on the North Fork River.
I always add waterfowl flying over the map with shadows, this makes them appear 3-D. Also, on canvas printed maps, I repaint the waterfowl and others areas to make them pop out of the map.
Normally, I add a vintage plane flying over and if you look closely, you may see a mermaid or fish in the waters.
Here's the end result. This is the traditional style map and I also do a more creative style. It's difficult to show the detail and color on the internet. I try to have the golden colors come through like a crackling fire. Can you feel the warmth? See more at www.LeoLakes.com