Above the "Hauswiese" on the southern slope of the Helenental, which got its name from the once overlying "Festen House", are still the remains of the former castle Scharfeneck. Already in the year 960 a "Ursel" is called as the Tursen's wife "on Scharfeneck". This is the first documentary mention of Scharfeneck. However, there is clear evidence to suggest that this spot on the mountainside was used much earlier, at least as a lookout point. For it happened in 1923, when a small landslide on the Hauswiesenberghang uncovered a larger Erdstall, which dragged itself to the ruins. It contained many Roman coins and potsherds. This circumstance is likely to support the hypothesis that the emergence of Scharfeneck Castle dates to the Roman occupation in the first century AD. The castle was used very early as a widow's seat, probably as early as the 13th century. In 1405 the Friedrich von Scharfeneck issued a letter of purchase, with which he could be clearly identified as Lord of the castle Scharfeneck. However, there is a legend from the 13th century which states that the Scharffenecker had nothing but their almost invincible castle and the vast forests all around. Therefore, they also believed themselves entitled to take control of the small Helenental to seize.