The Altenbeken Viaduct is a 482 metres long and up to 35 metres high double track limestone railway viaduct. It spans the Beke valley, west of the town of Altenbeken, in the Land of North Rhine-Westphalia, Germany.
The viaduct is Europe's longest limestone bridge, and its construction was one of the earliest significant events in the history of rail transport in Germany. As part of the Hamm–Warburg railway between Paderborn and Altenbeken, it is still in use today. It is also the emblem of Altenbeken, and is depicted, in stylized form, on the coat of arms of the municipality.
Address Adenauer Straße, Altenbeken 33184, Germany
Coordinates 51°45'47.692" N 8°55'35.753" E