Boundary Stone 147, Boundary point at intersection of Tyrol, Bavaria, and Vorarlberg, Austria.

Boundary Stone 147 is a granite column at 1,883 m on the slope of the Gehrner Berg, a few hundred metres southeast of the Haldenwanger Eck in the Allgäu Alps. It marks Germany's southernmost point, in the municipality of Oberstdorf, some 17 km southwest of the town centre. The nearby Haldenwanger Eck, a 1,931 m rise, carries Border Stone 149.

The old stone dates from 1844. In 1986, on the initiative of the state of Vorarlberg, a granite column was erected a few hundred metres southeast of Haldenwanger Eck at 1883 m to mark Germany's southernmost point, replacing the border stone. The 1844 stone was kept and transferred to the Bavarian State Surveying Office. Because of this point, Oberstdorf joined the Zipfelbund.

The name Haldenwanger Eck comes from the Old High German words halda (a steep slope) and wang (a naturally treeless pasture), with Eck meaning ridge; it refers to the Haldenwanger Alpe, not the separate municipality of Haldenwang. The nearby granite column marking Germany's southernmost point was put up in 1986 on the initiative of Vorarlberg, replacing an 1844 border stone that was kept and handed to the Bavarian State Surveying Office. Because of this southern point, Oberstdorf belongs to the Zipfelbund.

Several hiking routes lead to this marker from different starting points, with signs marking the mountain paths. The terrain is steep, so wear proper hiking boots and plan for a walk that takes several hours.

The granite column marking Germany's southernmost point was erected in 1986 on Vorarlberg's initiative, replacing an 1844 border stone that was moved to the Bavarian State Surveying Office. The spot lies at 1,883 m, a few hundred metres southeast of the Haldenwanger Eck summit. Because of this point, Oberstdorf joined the Zipfelbund.