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.

A cemetery located next to the Finkenberg Church, built in 1615 and rebuilt by Tillmann Roland in 1725, with impressive, coat-of-arms-decorated gravestones of the copper master families.

The Monschau Castle presumably originated at the beginning of the 13th century. In the middle of the 14th century, the complex was extended and enclosed by a mighty circular wall and embattlements. This nearly impregnable fortress of the powerful Jülich Counts was besieged with heavy artillery by Emperor Charles V in 1543 and was ultimately overtaken; the town was looted. The castle was only repaired to extend the fortifications of the lower castle.

The former medieval castle dates from 1370. Since 1960, the pretty baroque palace has been home for various types of schools.

The tower was erected on the mountain Hohe Acht, at an altitude of 747 metres.