When doing research work in locations lacking in place names people tend to create their
own names to make their job a little easier. Dyngjufjöll is one of those locations and
Hvanngil is one such place name.

To reach Hvanngil one drives east from the lodge in Drekagil and then south for approximately 5km along route F908. There, one will find a slightly obscure trail leading to the west over sands, gravel beds and small brooks. There is a 3.1 km drive along this trail leading to the mountains, the final distance being right at the foot of the mountain. A small stream appears to emerge from the rock itself but comes in fact from a small canyon or a crack in the mountain. After a 30 40 metre hike, following this stream, a wider canyon appears. Angelica (angelica archangelica)
grows in this canyon, amazingly considering the altitude, and the canyon derives it’s name from the flower hvönn
being the Icelandic name for angelica.

Source: Axel