A completely bizarre phenomenon is the Ema slag heap, now a protected nature preserve. It is a 315 m tall, man-made [kopec] created from slag dumped here that continues to smoke, with temperatures inside the hill reaching up to 1000 °C. We like to come here in the wintertime to warm up a little, while the rest of the year we admire the flora that love the warmth, the steppe fauna and the Ostrava panorama. Get ready for your selfies!