The old Dalquharran Castle consists of a ruined 15th-century tower, with a round tower at one corner. It was extended to form an L-plan, and rises to three storeys and a garret within the corbelled-out crenellated parapet. The castle was extended and altered in the late 17th century, and was surrounded by gardens and landscaped grounds. The basement is vaulted.
In the 18th century, when it was abandoned for the mansion of Dalquharran New Castle. Today the ruins of the old castle are reachable via public footpaths along the riverside, and although the castle is labelled dangerous, there is evidence of it regularly being used as a drinking den.
The Church of St Donatus name refers to Donatus of Zadar, who began construction on this church in the 9th century and ended it on the northeastern part of the Roman forum. It is the largest Pre-Romanesque building in Croatia.
The beginning of the building of the church was placed to the second half of the 8th century, and it is supposed to have been completed in the 9th century. The Zadar bishop and diplomat Donat (8th and 9th centuries) is credited with the building of the church. He led the representations of the Dalmatian cities to Constantinople and Charles the Great, which is why this church bears slight resemblance to Charlemagne's court chapels, especially the one in Aachen, and also to the Basilica of San Vitale in Ravenna. It belongs to the Pre-Romanesque architectural period.
The circular church, formerly domed, is 27 m high and is characterised by simplicity and technical primitivism.