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The Danube Bike Path is a European long-distance cycle route, that begins further upstream the river, but the section between Passau and Vienna is the most travelled by far. The surface and signage along the route is very good and there are many places that invite the cyclist to stop and have a wine or beer.
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Dreiflüsseeck
At the Ortsspitze ("Tip of the Town") at the eastern end of the old town you have the view of the point of confluence of the three rivers, Danube, Inn, and Ilz.
Jesuitenkirche St. Michael
This baroque church on the river banks gives Passau its typical looks of an Italian town. The church was completed in 1678 and is one of the main centres of the Jesuits in the region.
Altes Rathaus
The Old Town Hall was completed 1405 in Venetian style and has ever since kept its design. The interior is designed in a baroque style. It still houses parts of the city administration.
Veste Oberhaus
The fortress was built in 1219 by Passau's Prince-Bishops in order to control commerce across the rivers. During the Napoleonic Wars the castle was one of the strongholds against the Austrians (Bavaria sided with Napoleon at the beginning of the war). Due to several changes over the centuries today's castle consists of Gothic, Renaissance and Baroque parts. Today the fortress houses a museum focussing on the history of Passau and its surroundings. It also offers one of the best views over the city and the confluence of the rivers.
Glasmuseum
The museum focuses on the most important era of glass manufacturing from 1650-1950 with exhibits from Baroque, Rococo, Art Noveau, Art Deco, and Modernism. Friedrich Dürrenmatt once called it the world's most beautiful glass house.