Agua Dulce Cove in San Carlos, Mexico, is a reef site distinguished by a nearby freshwater spring and a prominent gorgonian sea fan forest located just offshore. The site offers both shore and boat entry options, making it accessible for intermediate divers. Water temperatures fluctuate significantly throughout the year, ranging from 17C in the winter months to 30C during the late summer. The transition from the surrounding desert landscape to the marine environment provides a unique setting for underwater activities. With a snorkel rating of 4 out of 5, the area is well-suited for both diving and snorkelling enthusiasts.

Punta Willard (Northwest Tip) is a high-energy site located where the open Gulf meets the island. The topography consists of dramatic underwater rock formations, featuring both reef and wall structures. Due to the exposed nature of this location, divers encounter moderate to strong currents, making it suitable for advanced divers only. Water temperatures fluctuate significantly throughout the year, ranging from 17C in winter to 30C in late summer. The site supports a diverse range of marine life typical of the region, including various reef fish and invertebrates. Boat access is required to reach this site, which is also highly rated for snorkelling.

Punta Narragansett is a rugged point located on the western coast near San Carlos. The underwater topography is defined by large boulders, which create a complex environment for exploration. This site is accessible only by boat and is suited for intermediate snorkellers due to the presence of moderate currents. Water temperatures fluctuate significantly throughout the year, ranging from 17C in the winter months to 30C in August. Snorkellers should remain aware of boat traffic in the area and exercise caution regarding sea urchins found on the reef structure.