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

He had always been curious about the odd places in the world, the ones that no one seemed to know about. One day, while exploring an abandoned building, he found a hidden door that led to a secret passage. He descended into the darkness, curiosity driving him forward, until he came to a large door. When he tried to open it, he found that it was locked. Suddenly, the door opened and he found himself in a room filled with strange symbols and icons. He heard a voice calling his name from behind the door and he walked forward, curiosity getting the better of him. As he reached the door, it closed behind him, trapping him inside.