Rifts

A man who steps into the Rift doesn't die. He gets "downloaded" into another coordinate system—a space running on another set of rules.

The moment the system first produced the word "Rift" on its own. Location S-17-R, on the morning of New Year's Day, Kaiyuan Year 1010.

A place that "should be there, and isn't." Official designation: the Rift.