4km/2.5mi northeast of Petronell lies Bad Deutsch-Altenburg, with hot sulfur springs (28 deg C/82 deg F), which were known to the Romans and are said to help rheumatic and other complaints. In fields on the western edge of the town a religious site has been uncovered.
The 17th C. Schloss Ludwigstorff in Bad Deutsch-Altenburg contains an African Museum. On display are natural history and ethnological exhibits, including carved, brightly colored masks and cult objects, as well as dioramas.
The Carnuntinum Museum - also an important example of late 19th C. architecture - contains finds from Carnuntum, including gravestones, statues, reliefs, weapons and items from everyday life. Worthy of particular mention is a Mithraeum, with a carving of Mithras killing the bull, and votive offerings. The museum was renovated between 1988 and 1991 and brought up to the most modern technical standards.
Address: Carnuntinum Museum, Hauptstrasse 296, A-2404 Bad Deutsch-Altenburg, Austria
On the Pfaffenberg south of Bad Deutsch-Altenburg a temple precinct dedicated to Jupiter Optimus Maximus Carnuntinus has been uncovered. Remains of temples, pillars to Jupiter and altars have all been preserved. On the Kirchenberg at Bad Deutsch-Altenburg, from where there is a superb view over the Danube, it is planned to erect a museum (to be known as the Pfaffenbergmuseum) to house the finds from the temple precincts.