AEST 10:00, Sun May 26 2013
The city of Frankfurt has celebrated its infrastructure and unique skyline during the annual Skyscraper Festival.
The two-day event gives many of the city's high-rise buildings the chance to host parties while allowing daredevils to attempt stunts off their facades.
Thousands gather to see tightrope walkers, base jumpers, sand castle builders and pop musicians ply their trade.
This year's highlight was professional Austrian slackliner Reinhard Kleindl walking along a 30 metre long cable which was suspended 185 Metres from the ground.
Austrian slackliner Reinhard Kleindl prepares to walk between two buildings.