Caleta Falsa, also known as Punta Perdices, is a sheltered coastal lagoon located near San Antonio in Río Negro province. It is formed by a narrow arm of the sea that penetrates inland from the larger Bahía de San Antonio within the Gulf of San Matías. The primary access for paddlers is via Puerto San Antonio Este, approximately 60 kilometers from Las Grutas. From the port, a coastal track begins at the Mirador Norte and leads to the entrance of the caleta, where the path becomes a narrower trail through typical coastal shrubs. The final approach to the water is across a ground completely covered in white seashells that crunch underfoot. This unique shell-covered shoreline and the contrasting blue of the sheltered sea water are defining visual characteristics. The water within the caleta is exceptionally calm, clear, and transparent, creating a mirror-like surface that reflects the shell-laden bottom. This quiet, protected environment makes it ideal for paddling, swimming, and snorkeling, as it is notably sheltered from the wind compared to the open coast. The area is an oasis of blue waters, and the surrounding terrain is abundant with mollusk shells. There are no specific facilities, regulations, or recommended routes for paddlers, and access involves navigating an unpaved track that becomes a trail.