Black holes that occur in nature are most likely to be rotating coal black holes. If you try to travel in a straight line towards the center of such a rotating black hole, the frame dragging effect will instead cause your path to spiral in towards the black hole like a boat caught in the current of a whirlpool. With that being said, it would be possible to cross the event horizon of supermassive black holes safely. These are the black holes found at the centers of galaxies which have massive accretion disks and energetic jets. It is nearly impossible to represent the view near of this a black hole with a 100 per cent scientific accuracy. In interstellar for example, the Doppler shifted light from the accretion disk was reduced to avoid confusing the audience. However, there are some simulations that are much more accurate scientifically speaking. This simulation shows the approach to a realistic black hole with an accretion disk and jets. The set of circles at the bottom left are a map showing us where we are in relation to the black hole. The green represents the region outside of the innermost stable circular orbit. The yellow region is the area outside of the photon sphere where photons can orbit the black hole. The outer and inner red circles are the outer and inner event horizons. The clock at the bottom right shows the time on a clock falling in as read by an observer far from the black hole. As we approach the black hole, we see the two orange color jets streaming outwards horizontally and the rotating accretion disk. As a result, all the dust and gas orbiting the black hole, it is difficult to see the location of the event horizon. As we fall closer to the inner most stable circular orbit, our friends far from the black hole see our clock appears to tick very slowly. As we cross through the event horizon, we continue to see the glowing gas outside of the black-hole. Light from all the stars and galaxies in the universe enters the black hole and is concentrated at the inner horizon leading to a blinding flash of light at the incident we smash into the singularity. A trip into a supermassive black hole would take about four hours, but when observer faraway our trip across the event horizon appears to take an infinite amount of time. They would watch our clocks slow down the closer we approach the horizon, and would quickly get bored. University of Alberta scientist, Eric Poisson and Werner Israel were the first physicists to show that the inner or Kushi horizon of a black hole is not traversable. For my own PhD work, I demonstrated that for any realistic black hole, once you enter the black holes event horizon, you cannot avoid hitting the singularity. So, if you are interested in traveling to distant parts of the universe, entering a black hole is not a good idea. The singularity at the core of a black hole is an unavoidable obstacle. So, is it possible for space-time to warp in such a way that does permit long distance travel in the universe? In theory, yes. Wormholes are hypothetical space-time structures that could act as bridges to different parts of the universe, but wormholes come with their own set of problems and challenges, and aren't much more likely to help you travel throughout the universe.