Bonn
The Poppelsdorfer Allee, an alley flanked by chestnut trees, connects the Kurfürstliches Schloss with the Poppelsdorfer Schloss, a palace that was built as a resort to prince-electors in the first half of the 18th century. This axis is interrupted by a railway line and Bonn Central Station, a building erected in 1883/84.