CNN PRODUCER NOTE The sea caves at Lake Superior in Wisconsin have been attracting a lot of attention this winter. The caves, usually only able to be visited in the summer by watercraft, are now accessible by walking across the frozen lake. "Natural springs and snow melt drip down from the cliffs above and refreeze, forming beautiful ice formations around the sandstone cave structures," Dylan608 said. He and his friends, including wedding DJ JD Fisher, decided to visit the caves at night and see how they would look illuminated by 10 LED lights. "I have been to the caves a couple times in past years," Dylan608 said. "The ice formations have been different every time that I have visited them." While they are captivating in the daylight, he says that they take on a surreal quality at night.