CultureDiscovering the World beneath CologneTo view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoCulture02/15/2020February 15, 2020From the remains of 2000 year-old Roman structures, to a concert hall, and the 19th-century sewer system, a trip beneath Cologne has much to offer. https://p.dw.com/p/3XlTnAdvertisement