Anderson Spring forms an oval spring pool that is 6 ft (1.8 m) long and 3 ft (0.9 m) wide. Its depth is 3 ft (0.9 m). The spring vent discharges water directly into the Suwannee River. The vent is located about 10 ft (3.1 m) down on the river’s bottom. Spring water is clear and yellow-greenish. Limestone is exposed at the vent. There are variable amounts of algae within the vent and the surrounding depression; however, there is no other aquatic vegetation present. The state-owned area surrounding the spring is comprised of limestone outcrops covered with lush ferns and moss. High ground rises to about 25 ft (7.6m) above the spring.
From the intersection of US 90 and River Road in Ellaville, drive south on River Road approximately 2.2 miles (3.5 km) to the intersection with the first road on the west side (right) past the I-10 overpass. Turn west (right) and travel approximately 0.3 miles (0.5 km) to a dirt parking area. The spring is located north (right) of the parking area.
This is an interesting and unique spring to say the least. The spring is actually under the main section of the Suwannee. Since the Suwannee is filled with tannic acid, the clear water emanating from the spring isn't immediately visible. In fact, while I'm fairly sure the spring is under the middle of the river, the spring water is forced to the bank on the east side (due to the temperature difference). Check out the pictures below to get a better idea of what I mean. This creates the opportunity to see the strange mixture of crystal clear and tannic water that is constantly changing.
The temperature difference is also fascinating. Just wading from the shore let's you take steps from warm water into icy water and back. I don't think swimming was intended at this spring but it was remote and inviting enough to give it a go.
I took a few movies of the descent to the spring mouth but I was never able to reach it completely; the visibility drops off linearly as the river water becomes more of the mixture. It's actually very creepy; the clear and chilled water is quickly replaced with increasingly darker and warmer water. It's enough to make you turn back simply from the sensation.
The banks are covered in limestone formations and rocks as is typical of the upper-Suwannee springs. It's somewhat difficult to position yourself for good photos as the only way to travel down the beach is over said rocks. Also, as motorized watercraft travels down the river, the waves disturb the visibility and mixture of the spring heavily.
This spring isn't much fun, but it's quite unique, well-marked from the road, and less than five minutes from the interstate, so I would recommend a quick trip to see it.