Decatur Flats is an expansive shallow area in Wheeler Lake, situated between the I-65 bridge and the Browns Ferry Nuclear Plant. This site features extensive mussel beds and remnants of aquatic vegetation that support a benthic ecosystem. Snorkelling here is best suited for intermediate participants due to the moderate currents and low visibility, which typically ranges between 1 and 2 metres. The site is accessible only by boat, with an average depth of 3 metres and a maximum depth of 6 metres. Typical sessions last around 45 minutes. Parking is available at the site for those arriving by land before boat deployment.

Painted Bluff is a limestone wall site located in Wheeler Lake. This freshwater location features underwater ledges and rock piles along the river channel, creating a vertical topography. Access is strictly by boat, and the site is suited for advanced snorkelers due to the presence of strong currents. Divers and snorkelers should be aware of potential hazards including deep water, low visibility, entanglement risks, and boat traffic. Facilities available at the nearby dive shop include parking, toilets, showers, a rinse station, air fills, equipment rental, a cafe, first aid, and boat charter services with guided tours.

Wheeler Lake KOA Beach at Mallard Creek is a private sandy beach situated on a peninsula within the campground. This freshwater site offers shallow, calm waters with an average depth of 2 metres, making it suitable for beginners and casual snorkelling. Visibility is variable, ranging between 1 and 5 metres. Divers and snorkellers should be aware of boat traffic in the area. The site features a range of facilities including parking, toilets, showers, and a rinse station. While the habitat supports various temperate freshwater fish and aquatic vegetation, sightings are not guaranteed. Water temperatures fluctuate significantly, reaching up to 32°C during the summer months.

Hambrick Cave in Wheeler Lake is a boat-access-only site featuring limestone cliff faces that drop off sharply into the water. The site is characterised by its cave entrance and underwater wall topography. Snorkellers can observe the limestone formations extending below the waterline, though entry into the cave itself is strictly prohibited. Due to the overhead environment and potential for boat traffic, this site is suited for advanced snorkellers. The habitat supports various temperate freshwater fish and aquatic vegetation typical of the region. Access requires a boat, as the site is located approximately 1609 metres from the shore.

Shell Island in Wheeler Lake is a freshwater site featuring shallow sandy bars and artificial reef structures. Suitable for beginners, the site reaches depths of 1 to 8 metres with an average of 4 metres. Snorkellers should expect mild currents and visibility ranging from 1 to 3 metres. The area is a popular location for boat traffic, which serves as a primary hazard. The habitat supports various temperate freshwater fish and aquatic vegetation. Access to the site requires a boat. Facilities available nearby include parking, toilets, showers, changing rooms, a rinse station, air fills, equipment rental, a cafe, first aid, a dive shop, boat charters, and gear storage.

Goat Island Ledges in Wheeler Lake features a combination of natural rock ledges and artificial reef structures. Located at the eastern tip of the island, the site is characterised by submerged timber and rock formations. Divers and snorkellers can explore depths ranging from 5 to 18 metres, with an average depth of 10 metres. Conditions vary, with visibility typically between 1 and 5 metres and mild currents. Access is possible via both shore and boat. Due to the presence of submerged timber, divers should be aware of potential entanglement hazards and the challenges posed by low visibility. This site is best suited for intermediate-level divers.