DF-1019

DF-1019 is the designation given by Da Vinci to an alternative dimension.
The physics in DF-1019 are nasty. The radiation degrades everything from our world rapidly, from flesh to metal, and even superpowers quickly corrode under its effects. You can create shields that block it, but they're incredibly power-intensive.
The dimension also contains a large number and variety of distorted creatures that attack outsiders.
SPOILER HERE:

Show spoiler

DF-1019 is the location to which Destruction Corps sent the Astrodome Convention Center during the Vegas Hero Convention.