The town lies in the Lower Austrian Industrieviertel region, on the right riverbank of the Danube River and the Danube-Auen National Park, south-west of Hainburg an der Donau and Devín Gate.

The health resort is centered on iodine and sulfur springs, which are one of the most powerful in Central Europe.

[3] The settlement in the Duchy of Austria, located around a medieval castle at the site of the former Roman camp of Carnuntum, was first mentioned in 1297 and received market rights in 1579.

From 1916/17 it was the site of a large longwave and high frequency radio transmitter station, which was dismantled in the 1980s.

A memorial stone marks the site of a mass grave, where exhausted prisoners shot by the security forces were buried.