Cathedral in the Desert is a freshwater canyon and cave site located in the United States near Lake Powell. Access is exclusively by boat, with the site situated 3400 metres from the shore. The topography features a narrow slit in the ceiling that allows light to filter into the flooded chamber. Depths range from 1 to 18 metres, and the site is suitable for advanced divers due to the overhead environment. Conditions include mild currents and visibility ranging from 5 to 18 metres. Divers should be prepared for cold water temperatures. The site is also rated highly for snorkelling when lake levels permit access to the floor.

Brown's Canyon is a freshwater site characterised by a series of submerged slickrock terraces that resemble an underwater staircase. This canyon and drop-off formation provides a distinct topography for snorkelers to explore. Access to the site is exclusively by boat, as it is located 30 kilometres from the shore. Conditions at the site are variable, with mild currents and potential hazards including boat traffic, cold water, entanglement risks, low visibility, and overhead environments. Due to these factors, the site is best suited for intermediate-level snorkelers. Facilities available in the area include parking, toilets, showers, boat charters, air fills, and a cafe.

Face Canyon is a freshwater site located in the United States near Lake Powell, characterised by dramatic vertical walls and the notable Fat Man Squeeze slot canyon feature. Divers and snorkellers can navigate the transition from deep channel water to the shallow, sandy terminus of the canyon. Access to this site requires a boat. Conditions are generally mild, though water conditions can vary. The site is suitable for intermediate divers and offers a high-quality experience for snorkellers. As this is a freshwater environment, there is no coral present.

Annie's Canyon is a freshwater site located near Lake Powell in the United States. Accessible only by boat, the canyon features shallow shelves that are well-suited for beginners. Divers and snorkellers may encounter moderate currents and visibility ranging from 5 to 25 metres. Water temperatures in this canyon are often warmer than those found in the main channel, which can facilitate longer sessions in the water. Due to the nature of the area, users should remain aware of boat traffic and potential fluctuations in visibility.

Labyrinth Slot Canyon offers a unique freshwater snorkeling experience through narrow, winding sandstone walls. Access to this site requires a boat, as it is located approximately 17 kilometres from the shore. The environment is characterised by calm water, which allows for observation of the intricate erosion patterns along the canyon floor. Depths at this site range from the surface down to approximately 9 metres. Visibility is variable, typically ranging between 2 and 6 metres. Due to the nature of the slot canyon environment, this site is best suited for intermediate snorkelers.