I found myself mysteriously drawn to this image of a portal of some kind in Marvel's Runaways #24. When one of the characters, Molly, notices it for the first time, she calls it "some kind of magical drive-thru." It shows up in front of a landmark donut shop in Los Angeles that has a giant donut on it's roof, so it's I guess that makes it a hole that like to hang out with another hole.

I've never seen a portal or a wormhole that leaks the way this one seems to. It must be very moist and wet in there for it to be leaking on the ground like that. Also, can you see how it seems to stain the area around it? It must be very powerful to do that. In fact, very bad things do happen to the Runaways when they go through the hole. Still, there's just something mesmerizing about it.