The municipality consists of the following sub-municipalities: Peer, Grote-Brogel, Kleine-Brogel, Wauberg, Erpekom and Wijchmaal.
Peer is the site of a famous annual blues music festival held in July.
Kleine Brogel, a village that is a part of Peer, includes Kleine Brogel Air Base. Rumours that American nuclear weapons under the NATO nuclear sharing program were stationed at Kleine Brogel have never been officially confirmed, but are now known to be true. A cable from the American Embassy in Brussels from Nov. 2009 - published by Wikileaks - not only confirms their existence, but also informs that the Belgian government rejected a proposal from Germany to propose to the rest of NATO that the nuclear weapons be removed from both countries (as well as those stationed in the Netherlands and Italy).
Peer has in the summer quite a nice temperature, around 20 degrees Celsius. In the winter it normally snows.