The Afelskreuz (Ablasskreuz) stands on an old Roman military road. For centuries pilgrims have been pilgrimage from Bonn-Cologne to the grave of the Apostle Matthias in Trier.
The main building of Burgau Castle has an eventful past. Having been originally built at the start of the 14th century by the Counts von Heinsberg and assigned to the fiefdom of Wilhelm von Burgau, the picturesque moated castle has since had quite a makeover.
The baroque church was built in 1727 as a hall building made of plastered quarry stone. After the population in Weiler grew steadily until 1906, plans for a church expansion were drawn up by baumeister Rüppel from Bonn. The church was to be extended with basalt stones by the addition of a transept and a choir room in neo-Gothic style, along with sacristy buildings. In 1909 the "new" church could be solemnly consecrated. Particularly worth seeing is the Marienaltar, which was taken over from the "old" church.