Prompt: Write a short story about a man who discovers a magical portal

Stefan had been out hiking when he stumbled across a large, shining object in the woods. He had never seen anything like it before, so he decided to take a look. When Stefan got close, he could see that the object was a portal. He stepped through, and found himself in a wondrous place. There were mountains and rivers and beautiful forests all around him. Stefan couldn’t believe his luck. He decided to stay there for a while, and explore all the new things he had discovered.