Fort Carroll is an artificial reef located 1609 metres from shore in the Maryland-Virginia Quarries. The site sits at a depth of 15 metres, with an average depth of 9 metres. Divers should expect visibility around 5 metres and mild currents, though conditions can vary. Access is by boat only. The artificial substrate supports a variety of local reef fish and invertebrates. Due to the low visibility and potential for entanglement within the structure, careful buoyancy control is required. Divers must remain aware of active boat traffic overhead and are advised to deploy a surface marker buoy before ascending.

Atlantic Coral Reef is an artificial reef exhibit located in the Maryland-Virginia Quarries. This controlled saltwater environment maintains a depth of 4 metres and offers a unique opportunity for divers to explore a contained habitat. The site is suitable for beginners, with shore entry and mild conditions. Divers can expect to encounter a variety of temperate marine life and invertebrates typical of the region. The dive typically lasts 40 minutes, with group sizes limited to six participants. Facilities at the site include parking and air fills. Divers should be aware of potential hazards, including entanglement, overhead environments, and sharp coral structures.

Loch Raven Cliffs is a quarry site in the United States offering depths ranging from 3 to 73 metres. Access is via shore, though the site is primarily suited for advanced divers due to challenging conditions including low visibility of 1 to 3 metres, entanglement risks, and down currents. The water temperature fluctuates between 4C and 28C, with significant thermal stratification occurring during summer months. Divers should be aware of boat traffic and the presence of a thermocline. Parking is available near the site. Snorkelling is not recommended here, as the site receives a rating of 1/5 for that activity.