The author and his trip partners first took about 3.5 hours of train from Delft to Essen, where we can find the architecture by David Chiperfield, OMA and SANAA.
SUBTLE AND RESTRAIN (Thanks for his tripmate teaching him the latter word.) can be used on the museum by David Chiperfield and the building by SANAA. Both buildings are really clean and tidy, even the details, which totally suit to the urban context in Germany .
In the next day morning they went to the Medienhafen in Dusseldorf. Frank Gehry's works and other neighouring buildings are quite interesting also..
The building he felt most "Tiefgang" is the work by Zumthor in Cologne. Just seeing the brick facade from outside you cannot see anything special. But the most sublime thing is the effect of light penetrating inside through those slits. It makes the interior really a holy place. The author had the first feeling here that architecture can create an admirable space.
Architecturally it is a good trip, but the author felt that german is indifference, same with its weather.
Extended information:
Museum Wolkwang
Zollverein Design School
Zollverein Kohlewäsche