The Galactic Center is seen in the constellation Sagittarius (the black hole's full name is "Sagittarius A*") from Earth. Sagittarius is best viewed from the southern hemisphere; it doesn't get fully visible above the atmosphere/horizon further north than 44 degrees N latitude; Seattle is at 47 degrees N, so that means I can't see the whole thing, even if I got out of the city smog and light pollution.
Those Mayans, on the other hand, had good viewing. I wonder what "aligned" means in this context? Maybe they calculated it would be directly overhead at that time.Find Sagittarius in the Night Sky