The Plazas are a pair of islets situated just off the east coast of Santa Cruz. Only South Plaza is a Visitor Site and is another example of a geological uplift. In this case, the southern portion of this narrow islet (only a couple hundred yards wide) has considerably more uplift to it, forming cliffs with spectacular views.
South Plaza is one of the smallest islands to be visited. A large colony of sea lions, numbering about 1,000 bulls, cows and pups, occupies the smooth rocks here. The small cactus forest is populated by land iguanas, which can be seen sunning themselves or feeding on Opuntia pads and fruits. Along the cliff edge nesting swallow-tailed gulls are the predominant seabirds, along with tropicbirds and shearwaters. During the rainy season the dormant ground cover undergoes a drastic change. The red Sesuvium turns bright green and the leafless evening-blooming Portulaca bursts into large yellow flowers relished by the land iguanas.