Oberbergischer Kreis maybe (https://www.outdooractive.com/de/wanderungen/oberbergischer-kreis/wanderungen-im-oberbergischen-kreis/1468312/) or the Sauerland even though that might be too far for a day trip
In addition to the above comments. If you get the chance, read a book called “Spearhead” by Adam Makos (or watch the documentary “Duel at the Cathedral”) which follows the lead up to one of the most famous tank duels of WWII that took place right at the footsteps of the Dom. You can follow the exact streets that the Germans and the American tanks took throughout Cologne and see exactly where the events took place. Specifically, two events, one involving a highly tense stand-off between a Pershing and a Mark IV tank that was suddenly interrupted by two civilians in a speeding car desperately trying to escape (took place at the intersection where the Christophstraße/media park u-Bahn station is). The other involved the same Pershing rounding a corner and suddenly coming barrel to barrel with a Panther at less than 100 meters from each other in front of the Dom (the panther was parked at the intersection of Trankgasse/Komedienstraße and Marzellenstraße whereas the Pershing peaked around the corner to confront the panther at Marzellenstraße and Dompropst-Ketzer-Straße).
While there are obviously no markers or indicators that anything happened now. The book is very descriptive on setting the scene and describing the aspects of the urban area that defined their strategies (the stories are told from both the German and American perspectives). When the city was rebuilt, they didn’t change much in terms of the street layout or the general building layout, so you can walk the routes and get a pretty good idea of what/where the tankers could see.
This was the pivotal engagement that helped secure Cologne in the hands of the Allies during the final months of WWII.
Highly recommended if you’re looking for more insight about Cologne and WWII!
https://en.m.wikipedia.org/wiki/Spearhead_(Makos_novel)
https://www.amazon.com/March-1945-Duel-at-Cathedral/dp/B07CPFV2RX/ref=nodl_
I'm no expert, but I'd first try in a Reformhaus, if there's one near you. They are the original organic supermarkets, long before modern organic supermarkets were a thing. They will certainly have smaller (1kg or so) packages, but there is a chance they can sell or order you larger sacks.
BTW, you can get it at Amazon, for example: https://www.amazon.de/Demeter-Weizen-ganz-keimf%C3%A4hig-Keimsaat/dp/B09SZK9FM8/
You can buy these on Amazon. I bought this during the summer when friends were visiting (American staying in Hurth for a year). No idea if it's comfortable or not.
Are you talking about individual ones, where you press them together?
Something like this https://www.amazon.de/Pamai-Dumplingmaker-japanische-Teigtaschen-Maultaschen/dp/B07N5DYPB8?
If so, I believe I saw them hanging at the Heng Long Asia Store https://g.page/HengLongSupermarkt?share
**The campaign raises awareness of the problem of 'dooring accidents'**
A large number of accidents between car drivers and cyclists occur when the car is stationary. According to accident research by insurance companies, more than half of all accidents between cyclists and parked cars are caused by inattentive opening of the car door. The consequences are often serious: according to information from the Cologne police, in 2020 well over 100 cyclists suffered injuries, some of them serious, as a result of so-called "dooring accidents" - whether they hit the suddenly opened door or were hit by moving traffic in the course of an evasive manoeuvre.
In the Netherlands, the so-called "Dutch grip" is a little trick taught in driving school. The door is opened with the hand facing away from the car door and the people in the car automatically turn towards the shoulder. With this trick, car drivers as well as passengers will certainly not forget to look over their shoulder and road safety for cyclists will be significantly improved.
But cyclists should also always be attentive and pass parked cars at the side of the road with a minimum distance of about one metre. On narrow streets, where it is difficult to keep the distance to parked cars at the edge of the road, it is advisable to ride confidently in the middle.
With an information campaign starting on 30 March 2021, the Department of Roads and Traffic Development is drawing attention to the issue of "dooring" and urging people throughout the city to "show consideration with hindsight" with posters of the same name.
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Translated with www.DeepL.com/Translator (free version)
You can't go wrong with the original one
Not quite exactly a kayak, it's technically a cheap packraft, I wanted something I could throw in a backpack and take with me. I'm not about to jump into rapids with this thing. The link is here it's about 50 euro cheaper than getting it in Amazon Germany :)