Date of discovery: Nov 16. 2019
Location of discovery: IO, moon of Jupiter
Source photo: https://photojournal.jpl.nasa.gov/catalog/PIA01108
I found these structures when looking at a NASA photo of the moon IO. It is a moon of Jupiter. There were two main structures that are visible. One is a giant bowl shape structure that measures over 50 km across! The other is a large structure built into the ground that is over 100km across. These are mega structures and only an ancient intelligent species would be capable of constructing such enormous buildings.
Scott C. Waring