Adlersberg, Mountain summit in Schleusingen, Germany.

Adlersberg is a mountain summit in the Thuringian Forest near Schleusingen, rising to approximately 850 meters (2,789 feet). The terrain features dense woodland and natural rock outcrops that shape the landscape throughout the area.

The 22-metre Adlersbergturm observation tower was built on the summit between 1884 and 1892 from local porphyry, with major repairs in 1929 and 1971–72. Since the Wende the tower has been opened and closed by the landlord of the Bergbaude inn at its foot, built in the mid-1970s as a Finnhütte.

The name Adlersberg means "Eagle Mountain". At the foot of the 22-metre tower, a Finnhütte built in the mid-1970s as the "Bergbaude Adlersberg" sold souvenirs and small meals; after the Wende it was privatised and runs as a mountain restaurant whose landlord also locks and unlocks the tower.

The summit is accessible via well-marked trails from Schleusingen, with parking available near the main trailheads. Routes vary in difficulty, so visitors should choose paths that match their hiking ability.

The 22-metre Adlersbergturm was built between 1884 and 1892 from local porphyry and has 91 spiral-stair steps. From the top, on clear days, the view reaches the Kreuzberg, Heidelstein and Wasserkuppe in the Hohe Rhön, with the Dolmar and Suhl's Friedberg industrial estate in front. The innkeeper of the Bergbaude at its foot also locks and unlocks the tower.