Where Is This Place?

I was doing my homework as usual when something strange happened. Suddenly, the electricity went out, and the room fell into complete darkness. A few seconds later, I heard a sharp whistle coming from below, echoing through the house. My heart started beating faster. Then, right in front of me, the door began to change. It slowly turned into something that looked like a glowing portal, swirling with colors I had never seen before. At first, I thought it was just a picture or a trick of my imagination, but the sound and light felt real. Without fully understanding why, I stepped closer. The moment I touched the portal, I was pulled inside. When I opened my eyes, I found myself in another world. Tall crystal towers surrounded me, the sky shimmered in strange shades, and unfamiliar creatures moved quietly around me. I couldn’t believe what I was seeing. Everything had changed in an instant.