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

John was tired of living the same life day in and day out. He was sick of being alone, and he was sick of not being able to find his way out. One day, while he was out walking, he found a mysterious portal. When he stepped through, he found himself in an amazing new world. He was surrounded by beautiful, crystal clear water, and there were lush trees and flowers all around him. He felt a sense of peace and joy that he never knew existed. After exploring the new world for a while, John decided to return home. When he got back to the portal, he found that it had disappeared. He was never able to find out how to get back to his old world, and he never forgot the amazing new place he had discovered.