The municipality lies 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.

Drees borders in the north on Döttingen, in the northeast on Herresbach, Baar and Mittelbaar, in the east on Niederbaar, in the southeast on Nitz, in the south on Kirsbach, in the southwest on Welcherath, in the west on Nürburg and in the northwest on Meuspath.

[1] The German blazon reads: Durch Zinnenschnitt geteilt von Blau und Silber.

The partition horizontally across the middle in the pattern of a crenellated wall ("Per fess embattled") refers to the time when Drees belonged to the Electorate of Cologne Amt of Nürburg.

North of the village, west of the road to Döttingen, is found an off-road track in a disused quarry run by the company Camp 4 Fun (even in German) where companies and private citizens can drive off-road vehicles over rough ground for training or leisure.