The Lincoln Cannon
This massive, 15-inch Rodman Gun made of solid iron weighs an incredible 49,000 pounds and could fire a 300-pound projectile more than four miles. The cannon was the first of its kind, and the largest smoothbore cannon ever made. It was used on the beach to protect Hampton Roads from attacks by the armored CSS Virginia.
The Lincoln Cannon can be seen on the edge of the Parade Grounds inside Fort Monroe.