The Civil War ironclad USS Monitor’s revolving gun turret can typically be found submerged inside a 90,000-gallon tank at The Mariners’ Museum and Park in Newport News. But recently the tank was ...

Despite being 240 feet down on the seafloor since 1862, the USS Monitor remains in “an excellent state of preservation,” according to Tane Renata Casserley of NOAA’s Monitor National Marine Sanctuary.