Last year, when I posted here about the history of the lighthouse at Devil's Island, Wisconsin, several of you noticed the island's extensive network of sea caves, carved into the sandstone cliffs by splashing waves and moving water. This year, when some friends and I went on a little paddle through the caves, I took along a video camera. It doesn't quite capture the eerie awesomeness of floating into the dark with Lake Superior behind you, but it's still pretty neat.
Apologies in advance for the occasional sudden jerky movements and possible audible swearing. Devil's Island is also home to a large population of biting flies and my ankles are, apparently, quite tasty.
Maggie Koerth-Baker is the science editor at BoingBoing.net. She writes a monthly column for The New York Times Magazine and is the author of Before the Lights Go Out, a book about electricity, infrastructure, and the future of energy. You can find Maggie on Twitter and Facebook.