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stuff to do in.cologne

Underground

2 places in Cologne

Cologne Cathedral Treasury© Elya · CC BY-SA 3.0

Cologne Cathedral Treasury

4.6(408)· Google

Set in medieval vaults beneath the north side of Cologne Cathedral, the treasury displays Christian art from the 4th to the 20th century.

Rechtsrheinischer Kölner Randkanal© OpenStreetMap-Mitwirkende · CC BY-SA 2.0

Rechtsrheinischer Kölner Randkanal

A twelve-kilometre underground relief canal that carries streams on the right bank of the Rhine from Bergisch Gladbach-Refrath all the way to Cologne-Stammheim, where they empty into the river.

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