The Classicist main building of the Õisu Manor was built at the turn of the 18th and 19th centuries. The wide and high parade staircase with sculptures of white marble makes the mansion impressive; one of the sculptures is a Protege of Home, the other one symbolizes Power. Many outbuildings belong to the Manor Ensemble, of which one of the most interesting one is the so-called "wry stable". There is an English-style park, one of the first in Estonia, behind the main building.
There has been a Õisu dairy school since 1922. At present school provides training in dairy work and other branches of food processing.
The Château du Haut-Koenigsbourg is situated in a strategic area on a rocky spur overlooking the Upper Rhine Plain, it was used by successive powers from the Middle Ages until the Thirty Years' War when it was abandoned. From 1900 to 1908 it was rebuilt at the behest of the German kaiser Wilhelm II. Today it is a major tourist site, attracting more than 500,000 visitors a year.
The first records of a castle built by the Hohenstaufens date back to 1147. The fortress changed its name to Koenigsburg (royal castle) around 1157. The castle was handed over to the Tiersteins by the Habsburgs following its destruction in 1462. They rebuilt and enlarged it, installing a defensive system designed to withstand artillery fire.
The fortification work accomplished over the 15th century did not suffice to keep the Swedish artillery at bay during the Thirty Years War, and the defences were overrun.