Frankfurt is the only city in Germany with skyscrapers, and a skyline. Seen from a distance, it could be somewhere in North America. After the river Main that goes through the city, Frankfurt downtown is commonly called 'Mainhattan'.
If you are walking around in town, and do not happen to work in one of these bank towers, you can only look up to the buildings - there is only one of them, the Main Tower, which has a viewing terrace on the roof and is accessible for everyone.
This weekend, everything was different: It was the 'Wolkenkratzerfestival', the Skyscraper Festival, and you had a chance to visit and ascend most of towers. Well, you could have, if you had been lucky and obtained one of the 80.000 or so tickets that were distributed for free via a webpage two months ago. It seems that all tickets were gone within an hour or two.
For all those people who, like me, didn't have that luck, there was a big party organized in town, and the day ended with an impressive firework. That was again looking up to the towers - but great!