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

John had always been a curious man, and when he was 23 years old, he finally got his chance to explore the world beyond his small town. One night, while he was out walking, he discovered a strange portal hidden in a field. After stepping through, he found himself in a colorful world full of magical creatures. For the next three days, he wandered around this amazing place, never knowing when he would return to his normal world. When he finally realized he would have to return, he was sad to leave, but grateful he had discovered this amazing place.