Built in 1941, the Seneca Army Depot covered over 10,000 acres of central Seneca County. It was commissioned by the US Department of Defense in response to the beginning of WWII and was originally dubbed the Seneca Ordnance Depot. The Depot was the US Army’s main East Coast munitions storage facility until it was decommissioned in 2000. In 2003, the US Military turned the property back over to the Seneca County IDA. Soon after, the County developed about 3000 acres to include several businesses, government offices & institutions and industry. Later, in 2016 the newly established business entity, Deer Haven Park, LLC purchased the remaining 7,000 acres. After more than 70 years of locked gates and secrecy, Deer Haven Park offers a glimpse into this mystical place. In addition to the unique and majestic Seneca white deer herd, it holds a mysteriously rich military history. Join us on a tour and discover the Majesty and Mystery of Deer Haven Park!