I was hiking with my dogs out in the woods in Issaquah, they know the trail well enough and they stick together as pack animals usually do, so I was just following them through the woods. They decided to take a path looking off shoot, it kind of looked like it could have been a part of the trail at one time, but hadn't been used for a while and over grown, or it could have been new and not traveled often, at the time I didn't know. Anyway we walked for a wile and eventually I saw a roof peak through the trees. As we walked closer, I could see that it was a plywood shed, like the kind in the home depot parking lot, on a trailer, a super nice double axle trailer. I think it was a meth lab. As soon as I saw it I called the dogs back and we left the area.