ShotHotspot has mapped 11 abandoned places in Sherman, Oregon, ranked by how often they're photographed, viewed and voted for. The most popular are Oregon Abandoned Farmhouse Dark, Douglas Hollow Schoolhouse School and Fairfield Homestead Dalles Abandoned. Some are private property or unsafe, so get permission before you visit.
We don't know whether you're allowed to visit any of these places. Many are private property, closed to the public or unsafe: get permission from the owner or the relevant authority, and take safety precautions.