Infrared filter. Partridge Falls, Pigeon River, Grand Portage Indian Reservation, MN. I'm standing in Minnesota, and the trees across the water are in Ontario Canada.
I needed the infrared filter because it was about noon, and even with 2 Hoya ND8's, it was still too bright. The camera was set to do 3 shots of 4 seconds each. I just needed 20 seconds to scramble over the wet and eroded rocks. And yes, that's me, about 25ft away from the tripod.