The Flag of Earth has flown - and is flying - over many observatories. The Flag also hangs in the offices of academics, scientists, ham radio operators, and in homes around the world.
Newly-added:
Homer, Illinois, home of James Cadle
Big Ear (OSU Radio Observatory)
International Centre for Radio Astronomy Research, Curtin University, Perth, Western Australia
Parkes (Australian National Radio Observatory)
Primary school Giacomo Leopardi, Rome, Italy
The North American Astrophysical Observatory (NAAPO)
Broadwell Hill Learning Center and Resiliency Initiative
Wright State University Astronomy Club
International Academy of Astronautics - SETI Permanent Study Group
Second Life at the Space Frontier Island
Columbus Optical SETI Observatory (COSETI)