The Tome School for was opened in 1984 as a college prep school for boys. It was a boarding school for K-12. The school had more than 12 buildings worth 2 million (57 million dollars today). They have dormitories, gymnasiums, and master cottages still remaining. The school was a very prestigious school, until the great depression, and closed in 1942 due to financial issues. Then it was acquired by the government where they opened 500 new buildings, and created the school into a Naval training center. They then moved the campus to East Maryland where it still operates. The base was officially closed in 1968 and sold all the buildings which now lay abandoned.
When I went, all the buildings were entirely fenced off. I found a place where you could crawl under, so If you would want to craw under or over the fence, then I think you might be able to get in.