If you get to the edge, you would find Milliways.

Since the universe is [still] expanding, then no matter how far you travel (limited by the speed of light) you would never reach the edge. The rate of expansion is estimated* to be 73 million kilometres per second per megaparsec. Both parts of that number are important because the expansion is not at the edges but throughout the universe. Don't think of the expansion as a ripple in water that travels outward from a point, but rather an elastic band that stretches everywhere along its length.

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* Yes, I know about the discrepency with the 67.5 kilometres per second per megaparsec estimate but that is too much detail for here.