If you gander south-west and south from the giant hole, you'll see two towns named Florence and Rome. Once you map these out and draw distances, you'll notice they form a near perfect Pythagorean Triangle. Shit's getting crazy now.
The giant hole, like said above, is location somewhere in Turin, NY. Turin - or "Torino" to locals - is also another city in Italy. This hole is in the Bonaparte's Cave State Forest, where there are "historical connections" to Napolean, whom we all know lived between 1769 and 1821. This is exactly 300 years after the events of Ezio's timeline (born 1459 with the last known appearance in 1506; spanning 47 years). "300" holds key significance because Ezio's reign takes place about 300 years after Altaïr's in the 1100s during the Third Crusades.
I've said it before, and I'll say it again: we're going to be going to the French Revolution in AC3, and roughly 250 years after that will be current day history, with a game - possibly AC4 - that could very well focus primarily on Desmond fighting the Templars in the 21st century.
Bring it, Ubisoft.