A Georgia property began as a military academy summer camp; after 30 years as one family's retreat, the 280-acre estate with a 10-acre lake and six miles of trails is asking $7.5 million

• The grandparents of current co-listing agent Ashley Altenbach purchased the property and gradually expanded it by acquiring additional acreage from neighboring landowners.
• A property once filled with the regimented routines of a military academy summer camp has taken on a very different rhythm.