The Little Greenbriar school is in the Great Smoky Mountains National Park. To find the school you must take a little hike. Park at Mecalf Bottoms and walk across the bridge. Take the Metcalf Bottoms Trail 0.6 mile to the Little Greenbrier School. If you wish, you can continue 1.0 mile from the school to the Walker Sister's farmstead on the Little Brier Gap Trail. The Little Brier Gap Trail starts at the barricade uphill from the school.
From All the Smokies.com I found this information.
Just a mile through the forest from Metcalf Bottoms lies the Little Greenbrier School. This charming 19th-century schoolhouse evokes the simpler education of years gone by. Built from logs split up to two feet wide, the school also served as a church from 1882 until the Park's creation. The original benches and desks still line the room, along with a lectern and a painted blackboard.
And this if from our diary the day we discovered this school: