The Château de Beaulon is a privately owned château located in Saint Dizant du Gua. The gardens, and landscape park, a Monument historique, are open to the public.
The château was built circa 1480 as a residence for the Bishops of Bordeaux. The château has both stone Gothic and Renaissance style facades. It is presently owned by the royal family of Abu Dhabi.
The present gardens were created beginning in 1942. The park includes a French formal garden around the château, and an English landscape garden. The garden is listed by the Committee of Parks and Gardens of the French Ministry of Culture as one of the Remarkable Gardens of France.
A major feature of the landscape park are the Fontaines Bleues, natural springs whose waters are an unusual brilliant hue of blue. There is also a round dovecote structure with a conical roof, dating from 1740, with fifteen hundred nesting holes.
Ehrenbreitstein Fortress was built as the backbone of the regional fortification system, Festung Koblenz, by Prussia between 1817 and 1832 and guarded the middle Rhine region, an area that had been invaded by French troops repeatedly before. The fortress was never attacked.
Early fortifications at the site can be dated back to about 1000 BC. At about AD 1000 Ehrenbert erected a castle. The Archbishops of Trier expanded it with a supporting castle Burg Helferstein and guarded the Holy Tunic in it from 1657 to 1794. Successive Archbishops used the castle's strategic importance to barter between contending powers; thus in 1672 at the outset of war between France and Germany the Archbishop refused requests both from the envoys of Louis XIV and from Brandenburg's Ambassador, Christoph Caspar von Blumenthal, to permit the passage of troops across the Rhine.