Around the base of the Fernsehturm is a construction which I think could best be described as a spiky thing. It could alternatively be described as a pavilion with ridged triangular reinforced concrete roofs, designed by the architects' collective Walter Herzog and Herbert Aust. You might think of concrete as a hard, inflexible material, but if you've ever seen anyone jump on one of these roofs, you'll know that's not true (I'm sure they weren't designed as trampolines though, so I'd not recommend trying it yourself).
There are stairs leading from the ground to an upper level, but it's rare to see anyone go up there. Does that make it sound exciting and mysterious to you? It does to me...let's see what's up there...
There's a walkway running all the way round. There's nothing super-exciting up here (like the entrance to the control room from which the Fernsehturm can be launched into space, something which must exist somewhere if the man who once sidled up to me while I was taking pictures and told me that the Fernsehturm is in fact the top of a spaceship is to be believed) but it does offer a different perspective on the surrounding buildings.
The view of the Rathaus from this height makes a change from always looking up at it from the ground, or down on it from the Fernsehturm.
There's also a nice view across to the Christmas market, with the fountains (currently switched off for the winter) in the foreground:
They used to put up an identical ferris wheel in front of the Palast der Republik, in the years just before it was demolished. I used to find it fascinating to see its bright lights reflected in the Palast's dull bronze glass.