It was probably the best-known tree monument in the "Frauensee Forest". Their location was not chosen without reason at the crossroads on the Jostberg. This is where the path from "Frankfurter Straße" meets the "Jakobsweg" at the Lehnhaus and the way to school - Jostpfad - between the Josthof and Frauensee. The old postal route to Frauensee, which comes up from the Rappelswiesen, also crosses here. The "Carlsbuche" was more than 200 years old before a forest district manager, who was only employed for a short time, had it cut down in 2003. Its name can be traced back to the Grand Duke of Saxe-Weimar-Eisenach, because he and his successors held exuberant hunts here. Grand Duke Carl August (b. 03.09.1757, died 14.06.1828) reigned from 1775. The planting of the "Carlsbuche" also falls into his time. The assumption that it found its destination here to commemorate him is supported by other events: The complete detachment of the Amt of Frauensee from Sachsen-Weimar in 1816, after the end of Napoleonic rule. The "Carlsbuche" symbolized the takeover of this forest area on the occasion of the 50th anniversary of the Grand Duke's service in 1825, and the former "Judengasse" in Eisenach was also renamed "Carlstraße". Hautsee erected a monument. Today, hikers can only find their rotten trunk along the way. In April 2021, the forest district manager Peter Sladko planted a young copper beech (red-leaved mutation of the common red beech) at the historical location of the "Carls beech". It still needs protection and the respect it deserves so that future generations can carry on its history Forestry office Marksuhl, B. Leser in May 2021 (... from information board)