This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Construction Technische Uni Darmstadt II. Construction of secret underground bunker or maybe just parking garage but that would be too banal on the grounds of the Technical University Darmstadt in Darmstadt Germany selfphotographed Uploader Photos taken by Ingolfson Construction sites in Germany Multistorey car parks in Germany