If you're visiting Tennessee, try to make a stop at Fort Donelson National Battlefield, which is located just northwest of Nashville. Ft. Donelson was the location of the North's first key victory of the Civil War and the place where Ulysses S. Grant earned his famous nickname "Unconditional Surrender" Grant.
For those of you interested in geocaching, there is an Adventure Lab called "Fort Donelson" located here. It will take you to key locations inside the battlefield, as well as The National Cemetery and then on to the Dover House.
For more information concerning the battles of Fort Donelson and nearby Fort Henry, pick up a copy of: