The imposing castle dominates the image of Blankenheim. Finds indicate that a Roman fort previously stood here. Gerhard I built the castle in 1115 above the source of the Ahr. Today the castle complex serves as a youth hostel and can be visited on request. Blankenheim Castle is located directly on the hiking trails Burgen-Route and Eifelsteig stage 6.
The parish church of Kehrig, consecrated by Karden, and the tithe belonged to the Castor monastery in Karden until 1802. 1656 owned the church of Kehrig, which after de Lorenzi from the 13th / 14th. It is said to have originated in the 18th century, three altars. The main altar was consecrated to Castor, the side altars to Mary and Peter. Today's parish church, which was built between 1869 and 1872 by the Düsseldorf architect Pickel, is consecrated to St. Kastor and St. Katharina.
The Hochkelberg, is at 675 metres, one of the ten highest mountains in the Volcanic Eifel. It is a former layered volcano and the Mosbrucher pond lies at the south side . Below its summit, there is a transmitter tower now.
In the picturesque village centre of Blankenheim, visitors dive into past times. The spring of the river Ahr, the historic town gates, the late gothic parish church and numerous half-timbered buildings adorn this historic place.