The A5 Falkenburg circular hiking trail takes you along the Stemberg up to Falkenburg Castle. Falkenburg Castle, known as the origin of Lippe, was built between 1190 and 1194 by Bernhard II and his son Hermann II. Under Princess Pauline zur Lippe, parts of the castle were used to expand the Gauseköte. Today, the ruins are owned by Stephan Prinz zur Lippe, a direct descendant of the builders. At the end of 2004, the association "Die Falkenburg e. V." was founded on a private initiative to preserve and restore the castle. Archaeological excavations have been taking place since 2005. Today, the castle ruins are open to visitors.