Coffin Island, also known as Isla de los Muertos, is a small island located off the coast of Puerto Rico. It is a popular tourist destination for its picturesque and serene surroundings, as well as its rich history and cultural significance. The island is named after the many wooden coffins that were discovered washed up on its shores in the 16th century. The coffins were thought to have been used by the indigenous Taíno people for burial purposes.

Today, Coffin Island is a popular destination for nature lovers, as it is surrounded by crystal-clear waters and is home to a variety of wildlife, including seabirds and marine life. Visitors can also explore the island's historic ruins, including the remains of a sugar mill and the remnants of a lighthouse built by the Spanish in the 19th century.