I have a day in Cologne soon is it possible to travel to either of these two for some shopping and is the station close by and is it expensive? I’ve been to Cologne once before and worry there is not much to do this time of year...
The Roman-Germanic Museum is indoors and right beside the Cathedral - and therefore very close to the Hauptbahnhof, It is, frankly, fascinating. Its website is
here; click on the EN where it shows DE | EN on the top right hand side of the home page to see the English description.
The name of the town (Köln) has the same root as Lincoln, from the Latin 'colonia' - both being places where retired legionnaires lived.
...as the Zoo would be a cold day out and many of the shops are outdoor?
'Markets' tend to be outdoors, but 'shops' are mostly inside...
Very close to the Museum and Cathedral, on the road called 'am Hof' is an Italian ice cream parlour called Eiscafé Raffaello. The last time I was there it was also autumn but that doesn't matter - it's also inside!. The ice creams come in glass beakers, either tall or wide, and are very good. Prices €6 to €9 each (or thereabouts). Not for everyday - but for a day out...!
Or go for a boat trip on the Rhine, the Køln-Düsseldorfer company runs short cruises until 27 October for around €11, six times a day. Details
here. You can sit inside with a beer... !
The Aachener Dom, the cathedral, is amazing (as is also the Kölner cathedral in a very different style) - if you like that sort of thing! The cathedral Treasury at Aachen is also well worth a visit - but the last time I tried to get in it was closed for maintenance. Cathedral Wiki article
here and Treasury article
here. For good value food and drink try the Aachener Brauhaus in the Kapuzinergraben - informal and friendly.