What are some jungles in Vietnam?

In GI jargon they were named by what the maps said at the time (no GPS in those days, just a good old fashioned map and compass). Or by what GI's had heard them called, e.g. "Black Virgin Mountain", "Hobo Woods", "Iron Triangle", "Ia Drang", "A Shau", "Duey Ba Din", "Dak To", "Mang Yang (pass)", etc.