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Photo: Raimond Spekking, CC BY-SA 4.0 via Wikimedia Commons
Also called the Locking Bridge. If you walk to the back of the Kölner Dom along a straight path, there is a bridge on the Rhine to your right that is covered in padlocks. The locks are placed there by couples to show their loyalty to each other. Couples often have their names and a significant date inscribed on the locks. There are other places around the world that have "love padlocks".
The Hohenzollern Bridge is a bridge crossing the river Rhine in the German city of Cologne. It crosses the Rhine at kilometre 688.5. Originally, the bridge was both a railway and road bridge. However, after its destruction in 1945 and subsequent reconstruction, the bridge has only been accessible to rail and pedestrian traffic.
© OpenStreetMap contributors
Central concert hall, opened in 1986. Main season September to June. Special summer shows.
A museum of modern art, near the central railway station and the Cathedral hosts a worthy regular exhibition and temporary exhibitions.
Great Saint Martin Church
A landmark Romanesque basilica in the Old Town, characterized by its distinctive trefoil choir and soaring crossing tower. It was founded around 960 AD as a Benedictine monastery. The current structure dates to the 12th and 13th centuries. Sightseeing is limited to times outside of religious services; information regarding public guided tours and group visits can be found on the official website.
LVR-Turm
The Köln-Triangle is a high rise building in Deutz, immediately by the waterfront. It is a part of a building complex fronted by the Rhine-facing Hyatt hotel and is hard to miss due to its prominence and quite easily accessible from both Deutz and the left bank of the Rhine (simply cross the Hochenzollern bridge from the Altstadt). On its 29th floor, it has a viewing terrace called Panorama, which is publicly accessible via a lift for a relatively reasonable fee. The terrace has glass all around it for both safety purposes and for exhibiting the names of various landmarks you can see from it. If you want to take really good photos, you may want to have a piece of cloth with you to clean the glass of fingerprints and such. The viewing terrace is closed during bad weather (like storm or hail).