The mountain Bolna is situated in the uppermost boundary of the valley which then proceeds to the southwest all the way down to the Ranfjorden.

The valley also includes several villages such as Krokstrand, Bjøllånes, Storvoll, Dunderland, Eiterå, Nevernes, Storforshei, Nevermoen and Røssvoll.

The mountain rocks in the Dunderland Valley are a caledonian shale, known from its occurrences of iron ore, mica schist, and marble.

The valley has several stalactite caverns in the limestone, with some of the tributary streams flowing for considerable distances underground.

From the upper parts of the Dunderland Valley, a sequestered bridle-path runs from Bolna to Saltdal Municipality on the Skjerstadfjord, with a branch through the magnificent Junkerdal National Park.

The German troops disposed the bodies the majority of the sick/diseased prisoners in the river Ranelva which flows through the Dunderland Valley.

For the Sámi, the valley has a special symbolic value due to a tragic incident that occurred about one hundred years ago.

In the early 1900s a bus returning from a Sámi conference in Tromsø drove off the road and crashed into the Ranelva river at the bottom of the valley.

In the summer of 2003, a Danish tourist discovered a battle axe (Streitaxe) close to the river Eiterå.

According to the geologist Barbara Prisemann (Department of Natural history, Rana museum), the axe is made from the green shale rock type.