This is a panorama from the last day of the "Bundesgartenschau" 2005 (BUGA 2005). This is an event held every two years in a German city. The BUGA is a federal horticultural show that lasts approximately half a year.
Part of the show area will become an open park, but other parts will become a housing development area. The part you see in the panorama will be part of the housing development area.
One theme of the BUGA was changing perspectives. In the bird's nest the people are smaller than the eggs of a gigantic bird. The brittle branches of a real world bird's nest are made using large trunks.