Located on Genovesa Island this bay is actually the caldera of an extinct, partially eroded volcano, with the surrounding cliffs forming the inner portion of the rim. Filled with birds and their activity. Along the trail are pairs of Swallow-tailed gulls, the only nocturnal gulls of the world, and Red-footed boobies, with their contrasting red feet and blue bills. Visits to Darwin Bay usually also include a swim and snorkeling for a short time off the coral beach.