The four cannons in the park surround the trenches and earthworks that make up the "fort".
A marker at the site reads as follows:
Dedicated to the memory of the Confederate soldiers who defended Jacksonville, 1861-1865.
Yellow Bluff Fort
A Confederate earthworks designed and located by General Robert E. Lee as one of a series of forts for the defense of the Saint Johns River. This fort was occupied by both Confederate and Union forces during the course of the war and is today in its original state.
Erected by the United Daughters of the Confederacy
Martha Reid Chapter
Jacksonville Chapter
Annie Perdue Sebring Chapter
Alexander H. Stephens Chapter
Mary Holland McCleary Chapter
Robert E. Lee Chapter
Site Donated by the North Shore Corporation 1950
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From the Florida State Parks website:
"Located near the mouth of the St. Johns River, this site was an important military position during the Civil War, allowing access to the inland areas of Florida's east coast. There was never an actual fort on Yellow Bluff, but an encampment that was fortified and equipped with large guns for protection. Constructed in 1862, the site was occupied by both Confederate and Union troops during the Civil War and-at its peak-housed over 250 soldiers. The site has a T-shaped earthworks and covers about 1.3 acres. Located on Yellow Bluff peninsula on the north side of the St. Johns River (on New Berlin Road). "