I assumed this was a schoolhouse, as it’s located on Old Seabrook School Road, but apparently, it was the old Dorchester Depot.
Historic Seabrook Village writes: This…is the Dorchester Train Depot that once stood at the railroad tracks in Midway. It was first moved to Martin Road in Midway where it was a laundromat and daycare center. It was later acquired by the Seabrook Village Foundation and moved to Old Seabrook School Road in Seabrook. It was stabilized but not restored. After being awarded grant money through the ISTEA program, the foundation was arbitrarily cut out of the grant by the Liberty County Development Authority in September 2001.
Vanishing Georgia: Photographs by Brian Brown 
The name of the road was requested by the residents on the road when the county initiated its 911 system. They wished to honor the Seabrook School that was moved from Trade Hill Road across from the Sunbury Missionary Baptist Church in 1991 and restored at its current location behind Palmyra Missionary Baptist Church on the other end of the road near its intersection with Fort Morris Road.
This is not a schoolhouse. It is the Dorchester Train Depot that once stood at the railroad tracks in Midway. It was first moved to Martin Road in Midway where it was a laundromat and daycare center. It was later acquired by the Seabrook Village Foundation and moved to Old Seabrook School Road in Seabrook. It was stabilized but not restored. After being awarded grant money through the ISTEA program, the foundation was arbitrarily cut out of the grant by the Liberty County Development Authority in September 2001.