Mansfield Dam in Lake Travis offers a diverse freshwater diving experience featuring artificial reefs, canyon topography, and sunken wrecks. Divers can navigate an underwater trail and compass course that connects various attractions, including historic dam construction materials and geological points of interest. Four underwater platforms are positioned at different depths to assist with training and buoyancy. The site ranges from 2 to 27 metres deep, with an average depth of 15 metres and visibility typically between 4 and 9 metres. Shore access is available, and the site is suitable for beginners. Divers should remain aware of boat traffic. Facilities include parking, toilets, showers, and an informational kiosk.

Lake Travis is a freshwater reservoir featuring a variety of submerged structures, artificial reefs, and drop-offs. Divers can explore depths ranging from 5 to 30 metres, with an average depth of 22 metres. The site is accessible via both shore and boat, though divers should remain vigilant regarding boat traffic and use a surface marker. Visibility typically fluctuates between 5 and 12 metres, and thermoclines are common. The site is suitable for beginners, while deeper sections provide challenges for more experienced divers. Night diving is permitted, offering a different perspective of the submerged terrain. Facilities include parking, toilets, and showers, with guided tours and boat charters available.

Windy Point Park in Lake Travis features a diverse freshwater environment characterised by a limestone bottom, canyon-like structures, and various artificial reefs. The site contains several sunken boats and underwater sculptures for visitors to explore. Access to the water is via a shore entry. Conditions are variable, with depths ranging from 2 to 30 metres and an average depth of 22 metres. Visibility typically fluctuates between 2 and 8 metres, and participants should be prepared for moderate currents. Due to these conditions, the site is suited for intermediate-level snorkellers and divers.

Hamilton Pool Preserve is a natural grotto formed by a collapsed underground river, featuring a 15-metre waterfall. Snorkellers can explore the limestone formations beneath the surface in depths ranging from 1 to 7 metres. Access is via a shore entry, and the site is suitable for beginners. The water is located 402 metres from the shore. Visitors should be aware that water temperatures can be very cold, particularly in winter when they may drop into the 40s Fahrenheit. Typical visits last around 120 minutes. Parking facilities are available at the preserve.

Blue Hole Regional Park in Lake Travis offers a freshwater diving experience within a spring-fed environment. The site features underwater cypress root systems and a depth range of 1 to 18 metres, with an average depth of 7 metres. Divers can expect mild currents and visibility typically between 10 and 20 metres. The water temperature remains consistent between 20 and 24 degrees Celsius throughout the year. Access is via a shore entry, making it suitable for beginners. Facilities available at the park include parking, toilets, and changing rooms. Due to the nature of the site, divers should be aware of deep areas.

Jacob's Well is a perennial karstic spring serving as the entrance to an extensive underwater cave system. The site features a vertical well structure with depths ranging from 1 to 9 metres, averaging 5 metres. Access is via the shore, and the water temperature remains a constant 20°C year-round. Visibility typically spans 10 to 20 metres. Due to the presence of an overhead environment, deep sections, and moderate currents, this site is suited for intermediate divers. Snorkellers can explore the surface well, which provides a distinct vertical perspective of the spring opening. Facilities available at the site include parking, toilets, and guided tours.

Aquarena Springs in Lake Travis offers a freshwater diving experience featuring artificial reefs, natural reef structures, and seagrass beds. The site is suitable for beginners, with depths ranging from 2 to 9 metres. Divers access the water via a shore entry. Conditions include a constant water temperature of 22°C year-round and visibility ranging from 10 to 100 metres. While currents are generally mild, divers should be aware of the potential for strong currents and entanglement hazards. Facilities at the location include parking, toilets, a dive shop, and guided tours. All divers must complete the Spring Lake Dive Authorization course prior to diving.

Sewell Park in Lake Travis offers a freshwater snorkeling experience at the headwaters of the San Marcos Springs. The site features a shallow average depth of two metres, ranging between one and three metres, making it accessible for beginners. Snorkellers enter directly from the shore to explore the river environment. Conditions at this site vary, with visibility typically ranging from five to ten metres. Divers and snorkellers should be aware of potential hazards, including strong currents, boat traffic, and the risk of entanglement. Facilities available at the park include toilets, parking, equipment rental, and guided tours.