The Nakan memorial on Tarakis
The Nakan memorial was a monument constructed on the planet Tarakis, an uninhabited planet in the Delta Quadrant.
Circa 2076, 82 civilian Nakans were massacred in the area the monument is situated on by a military unit. The Nakan people built the monument as a memorial. To ensure the full horror of the incident was told, even if the monument was never seen, a synaptic transmitter was installed in it during construction. This tramsitter broadcast a neurogenic signal throughout the Tarakis system that caused anyone within range to vividly experience the massacre as if they had helped to commit it.
In 2376, the crew of the Federation starship USS Voyager became exposed the memorial's signal while Voyager was passing through the system. The effect was severely debilitating on them. Investigating crew's seeming participation in the massacre, Voyager wen to Tarakis and an away team led by Voyager' master and commander, Captain Kathryn Janeway beamed down and found the memorial as well as remains of some of the victims of the massacre. Despite the strong objections of several of her senior officers, Janeway decided that the memorial should remain online, to keep telling the story of what happened (VOY: "Memorial").