Martin Falbisoner, CC BY-SA 4.0 , via Wikimedia Commons
The city of Cologne is located on the banks of the Rhine river and is known for its Gothic cathedral, its Roman heritage and its carnival. You can marvel at the majestic Cologne Cathedral, which took over 600 years to complete, explore the Roman-Germanic Museum and the Chocolate Museum, and join the fun at the annual Cologne Carnival, one of the largest street festivals in Europe.