Geisenheim, about 11,800 inhabitants, lies 1 km to the east of Ruedesheim. In the west of its boundary on the border to Ruedesheim lies the Rheingau bath (indoor swimming pool), northeast of the city lies the best known district, the wine place Johannisberg.

Landmark of Geisenheim is the "Rheingau cathedral", the Catholic parish church "Zum Heiligen Kreuz" with double tower from the 16-th century. Because of its 600-year-old linden-tree on the city hall forecourt Geisenheim is also called linden city. Geisenheim has a tradition as a school city, early secondary schools were concentrated here; presently the state high school Rheingau school and the private high school of the Ursulinen which is accommodated in the former Osteinschen Palais are worth mentioning. The Osteinschen Palais was established in 1766-71 by Maximilian Amor Maria von Ostein who had inherited at that time the whole property of his uncle, the elector and archbishop from Mainz Johann Friedrich Graf von Ostein. From the Osteinschen Palais he allowed to build an avenue to the Niederwald where he allowed putting on the later so-called Osteinschen Park according to the model of an English forest park with several places of interest (knight's hall, magic cave, Rossel and the Eremitage) beside the hunting castle Niederwald.

The worldwide approved research institution of Geisenheim beside the advanced technical college of Wiesbaden - branch office Geisenheim - with the departments for wine-growing, horticulture, drink technology and land care for wine-growing and wine preparation is from special meaning. It was established in 1872 as a "royal educational establishment for fruit growing and wine-growing" as the Rheingau already belonged to Prussia. A Geisenheim citizen had contributed substantially to the fact that Geisenheim got the surcharge for the research institution. To persuade the Prussian king of the quality of the local fruit growing and wine-growing, he had sent him boxes with apples, pears, peaches and grapes. Already before he allowed to build the castle Monrepos which lies now on the area of the research institution, where emperors Wilhelm I visited him in 1874.

On the Bischofsberg, which lies to the east of the city of Geisenheim the castle Johannisberg towers widely viewable the boundary. Around 1100 a Benedictine cloister had been founded here which was dedicated to the Baptist Johannis and which was abrogated after the Peasants' Wars in the 16-th century. In 1716 the prince's abbey Fulda acquired the Bischofsberg and allowed to build the baroque castle which the prince's abbots of Fulda used as a summer castle. In 1807 Napoleon gave the castle to his marshal Kellermann. In 1815 on the Viennese congress it was awarded emperors Franz I of Austria who gave it to his chancellor Metternich because of his salaries on the Viennese congress with the condition of the lasting wine tithe to the imperial house. During the 2-nd world war the castle was destroyed to a great extent and until 1951 it was rebuilt and after the death of the descendant of Prince Metternich it was acquired by the Oetker group.