"In Einstein's equation, time is a river. It speeds up, meanders, and slows down. The new wrinkle is that it can have whirlpools and fork into two rivers. So, if the river of time can be bent into a pretzel, create whirlpools and fork into two rivers, then time travel cannot be ruled out." - Michio Kaku
Zoom in to the intricately winding waterway to the right of the highway in the lower middle of the photo.