Originally Posted by
hedur
Nights 1-3 Berlin - I'll get in late the first night and have three full days there, leaving for Dusseldorf on an evening train on the third day.
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The area Savignyviertel
http://g.co/maps/dbe6f is always nice to walk and sit in the number of cafes around there. To the south you find a lot of nice, small restaurants with local food.
Nights 4-5 Dusseldorf - I'll arrive around 21:00 and check into the hotel. After a good night's sleep I'll have a full day to explore the city and spend one more night before taking an early train to Belgium...destination Bruges!
In Düsseldorf you should walk through the old town and enjoy the local beer wich is called "Alt". There are plenty of small, local breweries around there.
In addition the rhine-promenade is nice to see. There are a lot of other nice areas around Düsseldorf but I guess you won't have enough time to see it.
Night 9 Cologne - Then I'll take an early train back the way I came this time stopping in Aachen for a few hours. I'll hopefully get to Cologne by early evening time and spend the night and a half day there the next day.
Aachen ist quite small, compared to cologne, but has an interesting historic city center. You should see the cathedral with the throne of Charlemagne and take a guided tour, because there are some interesting legends and stories behind that stuff. This is really entertaining!
Cologne is also famous for the historic town and the cathedral which also is worth a visit. Since the central trains station is just five minutes away from these places this is not a problem.
I always recommend tripadvisor to get an idea which is very famous. If you have specific questions about transportation and stuff feel free to ask.
HTH
S.