This image was originally posted to Flickr by UR Alumni Travel & Learn at https://flickr.com/photos/50985549@N06/7295198842. It was reviewed on 2016-07-07 05:30:47 by FlickreviewR, who found it to be licensed under the terms of the cc-by-2.0, which is compatible with the Commons. It is, however, not the same license as specified on upload, which was the cc-by-sa-4.0, and it is unknown whether that license ever was valid.
Captions
Serino Aqueduct: Twin aqueduct tunnels at Pozzuoli
