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

In the city of Prague, there was a man who always felt a sense of wonder and mystery. He had never heard of a magical portal, but one day he stumbled upon it while walking on the street. As soon as he entered, he found himself in an unfamiliar place. He walked around for a while, exploring the strange sights and sounds, before he finally found his way back home. When he got there, he was amazed to find that he had just traveled across the world in seconds!