According to Albert Einstein’s Theory of General Relativity, it is feasible in areas of intensely strong gravity to create “wormholes” that connect two points that are widely separated in space or time (or both).
Unfortunately, the intense gravity needed to produce such an effect — such as that of a black hole — would collapse the wormhole before it could be used for a real traveler. In addition, while there is abundant evidence that black holes exist, there are no observations at all of any suspected wormhole.