5 Sights in Idstein, Germany (with Map and Images)

The Kalmenhof is a socio-educational institution of youth and disabled welfare with training and teaching in the regional centre of Idstein in Hesse, a former Nassau residential town. Some of the facilities of the Kalmenhof are listed as historical monuments. It is operated by a subsidiary of Vitos GmbH.

Wikipedia: Kalmenhof (DE)

The Unionskirche is the active Protestant parish church of Idstein, a town in the Rheingau-Taunus district in the German state of Hesse. Idstein was a residence of the counts of Nassau. The church building in the center of the historic Altstadt dates back to the 14th century when it was built as a collegiate church. It became Lutheran during the Reformation. Its interior was adapted in the 17th century to become a Lutheran Predigt- und Hofkirche. The most prominent decoration in the church is the series of 38 paintings by the Flemish painter Michael Angelo Immenraedt, an exponent of Flemish Baroque painting, and others. They follow a program of biblical scenes.

Wikipedia: Unionskirche, Idstein (EN), Heritage Website

The Alteburg fort is a Roman numerus fort that belonged to the western Taunus section of the Upper Germanic-Rhaetian Limes, which has been a UNESCO World Heritage Site since 2005. The remains of the complex are now located as a ground monument under a field located one and a half kilometers south of the Idstein district of Heftrich in the Rheingau-Taunus district in Hesse.

Wikipedia: Kastell Alteburg (DE)

The approximately 42-metre-high Witch Tower, the landmark of the city of Idstein, is the keep of Idstein Castle, which has been structurally modified several times and designed as a butter churn tower. Due to its exposed location and its height, it characterises the Idstein cityscape. It bears the international symbol for the marking of cultural property according to the Hague Convention.

Wikipedia: Hexenturm (Idstein) (DE)

Idstein Castle, later the Renaissance style Schloss Idstein, is located in Idstein in the county of Rheingau-Taunus, Germany. The hill castle was the residenz of the counts of Nassau-Idstein. The castle's Witches' Tower (Hexenturm) is one of the town's oldest buildings and a substantial local landmark.

Wikipedia: Idstein Castle (EN)