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Cape Marshall is an amazing dive site on Isabela Island, featuring a wall of volcanic rock sinking down to the bottom of the ocean. Its main attraction is a spot called "City of the Mantas", due to the fact that giant mantas are frequently seen here. The waters in this location are rich in plankton, which is their main source of food, especially from June to October. Seeing specimens of this majestic species on the bottom of the sea, swimming among kaleidoscopic fish, eels and turtles, is an unique and exciting experice for any diver.
Difficulty: Hard
Disembarkation: No Landing
Interactions: Diving
Our independent Galápagos Travel Guide has a complete page about City of the Mantas — wildlife, what you will see, and practical details, verified September 2026.