Braunsberg, Limestone summit in Hainburg an der Donau, Austria

Braunsberg is a 346 m high limestone massif on the Danube at Hainburg an der Donau in eastern Lower Austria. Its slanted plateau faces the Devínska kobyla in Slovakia; together they form the Hainburger or Hungarian Gate (Porta Hungarica), the Danube's break-through valley linking the Alps and the Carpathians. A toll road from Hainburg leads to the summit, where the Carpathian Germans' memorial stands.

Archaeological finds show that Celts settled here in ancient times and used the site. Later, the region was an important trade route and border area between empires because of its position on the Danube.

The name Braunsberg is remembered in the memorial to the Carpathian Germans on the summit, recalling their former homeland in Slovakia. Since 1986 archaeologists have rebuilt a Celtic rampart and a watchtower, which visitors can see today.

Several hiking paths lead up to the summit, all easily reached from Hainburg an der Donau and clearly marked. Be careful on slippery ground, especially at the start of trails and in wet weather.

The mountain is home to rare plants, including a clove pink variety found only in this mountain area and nowhere else. These flowers have adapted to the special limestone conditions.