At the "Booser Doppelmaar", western of the municiplity Boos it gives two extensive flat basins in the countryside. One of the two is a dry maar. The other is a pond . They are created through the meeting of hot magma.

The Ten Stargazes are places where you can observe the impressive night sky. They are easy to reach and perfectly equipped for an astronomical voyage of discovery on your own. Exciting information and suitable installations help to deepen the fascination of stargazing. Each Stargaze has been given its own theme. There, a variety of aspects of astronomy and nocturnal nature as well as local peculiarities are shown.

Aachen's historic old town invites visitors to take a stroll. Let yourself be guided through narrow alleys and across historic squares through Aachen's almost 2000-year-old history.

Embark on a journey into the past - the "Old Prison" has weathered all the storms of the past centuries and is now home to a local history museum on the upper floor.

Holzstraße is home to several heritage-protected buildings. Although the air raid on 16 November 1944 destroyed huge areas of the town centre, some houses on Holzstraße managed to survive this attack virtually unscathed.