Waterfalls

[KMAlexander]

Few ideas, first depending on how you're doing your mountains, Josh Stolarz has a great tutorial.

Historically waterfalls were represented in varying ways; for example, here's how Henry Popple did it in his 1733 Map of the British Empire in America.



In this 1929 map from Touring Club Italiano, they didn't do much except a little X and labeling the waterfall. (Gullfoss is an amazing fall in Iceland and worth visiting, FWIW.)



1851 R.M. Martin just labeled it.



H.G. Johnson sorta 3D-ed in 1849, but he's a wild man. Look how he's displaying the buildings. Heh.



John Melish did an interesting texture shift in 1891.



You could also do something like this—this is a satellite view of an underwater waterfall off the island of Mauritius in the Indian Ocean.