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

Thorne opened his eyes to find himself in a strange new world. He was surrounded by tall trees and blue sky, but there was also something else – a portal! He could feel a strange energy coming from it, and knew he had to find out more about it. He walked through the portal, and when he reappeared back in his own world, he knew he had to find another one to explore.