Hangvar church dates from the 13th century. The oldest parts are the choir and nave; the tower was built slightly later. The church has a decorated entrance portal, with sculpted capitals and a sculpture of a man's head above the portal. Internally, the church ceiling is supported by four vaults which rest on a central column. The base of the column is decorated with carved figures. Among the furnishings, the baptismal font is medieval, dating from circa 1250. The church has originally been decorated with six wooden sculptures dating from the Middle Ages but these are now displayed in the Gotland Museum in Visby. The altarpiece, made of wood, dates from 1684, while the pulpit is from 1633.
Bouillon Castle was mentioned first in 988, but there has been a castle on the same site for a much longer time. The castle is situated on a rocky spur of land within a sharp bend of the Semois River.
In 1082, Bouillon Castle was inherited by Godfrey of Bouillon, who sold it to Otbert, Bishop of Liège in order to finance the First Crusade. The castle was later fitted for heavy artillery by Vauban, Louis XIV's military architect in the late 17th century.
The castle is entered over three drawbridges. The main courtyard then leads to the ducal palace with its 13th century Salle Godefroy de Bouillon. From there visitors climb up to the top of the 16th century Tour d’Autriche for a breathtaking panorama of the town and river, before they way back via the torture chamber, citerns and dungeons, and past the 65m deep well Shaft.