Originally dating from the 13C, the cathedral was completely remodelled in the 15C in the Gothic style. There are also more recent features, such as the spire, which is early-20C.
The 93m-long nave is the longest in Denmark. The overall impression is of pleasing proportions and lofty elegance. Traces of 15C frescoes may be seen, together with a magnificent triptych dating from 1479, the work of Bernt Notke (1440-1509), an artist from Lübeck.

This Renaissance castle built in 1559 on an island in a lake has belonged to the Rosenkrantz family for 400 years. The family's origins lie in an idyll between an English princess and a Danish prince. The interior is predominantly furnished in Rococo style. The Winter Hall is furnished in gold leaf-decorated leather, and old French and Flemish tapestries embellish the corner room and tower room. A remarkable portrait of Frederik V by CG Pilo, official painter to the court, graces the great hall.

Built around 980 with the typical layout of Viking forts, Fyrkat was protected by a round wall 120m in diameter. Two perpendicular alleys leading to the main gates and facing the cardinal points drew the limits of four zones where four wooden buildings, each with a capacity of 50 people, stood (oak replica outside). Finds from local digs are exhibited in the Hobro Museum, in a picturesque old building. The Vikingecenter is in the valley and has nine replica houses showing what life was like for Viking farmers.