"The skewered disco ball may well have been Socialist Germany's most innovative design, as its form predated the light-throwing device of the ABBA era by about 10 years. The 368-metre television broadcast tower, completed in 1969 and 70m higher than the Eiffel tower, even has a restaurant with a rotating floor (phone ahead for a table). Whether one's in the east or west, the tower's round head peering over rooftops certainly brings a level of humour to the skyline. Photos circling the enclosed observation level point out the landmarks for you."