Drei-Länder-Stein

The Drei-Länder-Stein is a boundary stone at the tripoint of the German federal states of Lower Saxony, Saxony-Anhalt and Thuringia near the Großer Ehrenberg mountain in the Harz.

The Drei-Länder-Stein is located in the South Harz at the tripoint of the three aforementioned states and also the tripoint of the counties of Goslar (Lower Saxony), Harz (Saxony-Anhalt) and Nordhausen (Thuringia). In addition the nature parks of Harz (Lower Saxony), Harz/Saxony-Anhalt and South Harz meet here. The boundary stone is around 3.3 km southeast of Hohegeiß (Lower Saxony), some 3.3 km south-southwest of Benneckenstein (Saxony-Anhalt), circa 1.8 km northwest of Rothesütte (Thuringia) and about 1.25 km (all distances as the crow flies) northeast and below the summit of the Großer Ehrenberg (635.5 m above sea level (NN); Thuringia) at about 575 m above NN. The Bundesstraße 4 passes by just under 100 m southwest of the stone. There is a car park for hikers here called Jägerfleck.

The Drei-Länder-Stein was probably erected by 1749. It bears the inscription: HB (Herzogtum Braunschweig i.e. Duchy of Brunswick), AB (Amt Benneckenstein), which was later changed to KP (Königreich Preußen i.e. Kingdom of Prussia), and GW (Gräflich-Wernigeröder Forstgebiet i.e. Comital Wernigerode Forest Estate).

...
Wikipedia