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

It was an ordinary day, until John found himself in front of a mysterious portal. At first he thought it was just a figment of his imagination, but as he stepped through he was met with a whole new world. John found himself in a mystical land full of green grass, sparkling water, and majestic mountains. He was also granted one wish. John took advantage of this opportunity and wished for more money. He was amazed at how quickly his wish came true and was able to immediately retire. John never forgot his magical portal and would visit it every chance he got.