The Unidentified Trawler is a shipwreck located on Stellwagen Bank near Cape Ann, United States. Resting at depths of 32 to 33 metres, this site functions as an artificial reef on an otherwise featureless bottom. Divers encounter strong currents and visibility ranging from 5 to 12 metres. Due to the significant depth, cold water temperatures between 4 and 16 degrees Celsius, and entanglement risks within the structure, this site is suitable only for advanced divers. Boat access is required, and surface markers are essential due to active boat traffic. Dry suits are recommended for thermal protection, and dives should be planned around slack water to manage current intensity.

Sponge Forest is a deep-water reef located off Cape Ann, requiring boat access. The site sits at depths between 20 and 33 metres, with an average depth of 32 metres. Divers encounter strong currents and visibility reaching 30 metres. Water temperatures are cold, ranging from 5 to 16 degrees Celsius, with temperatures at depth rarely exceeding 10 degrees Celsius. Due to the depth, cold conditions, and potential for strong currents, this site is suitable only for advanced divers. Hazards include boat traffic, entanglement risks, jellyfish, and sharks. Divers should use a drysuit and maintain strict buoyancy control while monitoring depth and current conditions closely.

The Pinthas is a shallow reef site located in Cape Ann, United States, with depths ranging from 4 to 7 metres. This site is accessed by boat and features a moderate current, requiring divers to plan their movement carefully to drift back toward the exit point. Visibility is consistently around 5 metres, creating an intimate environment suitable for observant diving. The reef supports a variety of marine life typical of the region, including various reef fish and invertebrates. Given the shallow depth and manageable conditions, the site is suitable for newly certified divers and those looking to build confidence, with year-round diving opportunities available.

Brant Rock in Cape Ann provides shore-access diving along a reef and wall structure situated at depths of 9 to 12 metres. The site features a drift element where moderate currents move divers along the reef face. Visibility typically ranges from 5 to 10 metres. Due to the surf and shore break, entry requires caution, and divers should be aware of potential rip currents. Water temperatures fluctuate between 4 and 18 degrees Celsius, necessitating thick exposure suits, hoods, gloves, and boots. Facilities including parking and toilets are available on site to assist with gearing up and warming down.

Corporation Beach offers a shallow shore-entry dive featuring a combination of natural reef, artificial reef structures, and seagrass beds. Depths range from 3 to 6 metres, with an average of 5 metres, making it suitable for beginners. Visibility varies between 5 and 15 metres, and currents are generally mild. Divers should be prepared for significant seasonal temperature fluctuations, ranging from 4C to 21C, requiring appropriate thermal protection. Hazards include boat traffic, surf, and potential entanglement in seagrass. Night diving is permitted at this location. Facilities available at the site include parking and toilets.