The municipality lies in the Kyll valley in the Vulkaneifel, a part of the Eifel known for its volcanic history, geographical and geological features, and even ongoing activity today, including gases that sometimes well up from the earth.

Locally, its most striking feature is the relatively flat and broad Kyll valley, which at the edges rises in terracelike formations to elevations of more than 500 m.[4] Dohm-Lammersdorf’s two Ortsteile are, as its hyphenated name implies, Dohm and Lammersdorf.

The Lords of Densborn (and then beginning in 1654, the Electoral-Trier chancellor Johann von Anethan and his heirs) held the high, middle and low jurisdiction here as well as the hunting and fishing rights.

The Trier Cathedral Capitulary, Baron Johann Sigismund Otto von Quadt called himself “a lord of Dohm and Lammersdorf” in an inscription under a coat of arms in a Mürlenbach church window in 1720.

The Luxembourgish lordship over Densborn also meant that the Catholic faith was maintained in Dohm and Lammersdorf in the late 14th and early 15th centuries, whereas the rest of the Parish of Gerolstein turned from the Church.