Crab Cay, or Cayo Cangrejo, sits roughly one kilometer (.6 miles) off the east coast of Isla de Providencia. From Providencia, the view of the small outcropping makes for a prime photo op, but snorkelers will be itching to hire a boat or rent a kayak and dive into the crystal-clear waters—a dazzling array of shades of blue—surrounding the cay.
https://www.afar.com/places/crab-cay