Rauðaskál, also known as the Apple Crater, is a colorful crater near the Hekla Volcano in Iceland. The short hike to the crater offers stunning views of the vibrant green and red colors against the dark volcanic landscape. It's a quick and easy hike that can be done in less than an hour, making it a perfect stop if you're exploring the area. Just remember to keep an eye on Hekla, as it's an active volcano that can erupt with little notice.