New York, everything seems to be working quite busy. The stereotypical New York scene. People cussing at each other, giving rude gestures, sometimes there's a mugging here and there, other times there's some googlie eyed boyfriend who gets kicked in the balls for looking too closely at another girl. . . the stereotypes live and abound. As do things that aren't so stereotypical. An old homeless man is given enough money to stay over at a motel for a weekend, some people are fed at soup kitchens. . . some children are lucky enough to be adopted instead of staying permanently parent-less, a white man saves a black man from being beaten to death by gang members, police officers promise to give some first time misdemeanors off with a warning, and all sorts of happenings are reaped and sown throughout the day.
At the end of the day, an old man ninety five year old man falls dead, seemingly of no malicious causes. That's when everything started. A portal opened up from the void of space, somehow penetrating the invisbile walls and barriers of force which protected the Earth from outside influences. The entire planet falls into a spiral of unreality, reality and something strange in-between, and suddenly New York isn't just New York. It's not even New York, New York. It's New York, New York, New York, and whatever else it's supposed to be. Spider man patrols the streets on his daily routine, Harry Dresden scouts the Big Apple for adherents of the dark arts, and all manner of heroism and villainy takes place, and neither the newcomers nor the daily inhabitants even knows what kind of change if any has just occurred.
Atlantis, the abandoned city of the Ancients. Star Gate-Command is just about to discover this strange, alien place in just a few hours, and they have no idea it still has inhabitants. In addition to just a little more than a few scores of inhabitants who have made the place home for a time span of three years, they are about to have new visitors, whom they may decide to welcome or get rid of. The present inhabitants either don't know of the abandoned place's history, or simply aren't telling.