About 50 km west of Kassel is...
by B_Caro
About 50 km west of Kassel is Bad Arolsen situated. It is a small & quiet town. It is situated in a very beautiful environment with a lot of walking & cycling possibilities.
Besides that, there is also the Schloss (Castle) which can be visited.
Take a look at the travelogues to see more.
Some more info can be found on BAD AROLSEN
Friedrichsplatz
by King_Golo
Firedrichsplatz (Frederick's Square) is the heart of Kassel. It's located just next to the main shopping street and a good place for relaxing or having a coffee in one of the many cafes. At the moment with documenta going on, Friedrichsplatz has been turned into a poppy field which looks magnificent. Unfortunately, this is only the case for 100 days - but who knows if Kassel's inhabitants don't get used to the field and want to keep it? We shall see next year!