Palmyra Atoll is an uninhabited coral atoll located in the North Pacific Ocean. It is one of the United States Minor Outlying Islands and is administered by the U.S. Fish and Wildlife Service as part of the Pacific Remote Islands Marine National Monument.

Palmyra Atoll has a total land area of approximately 6 square miles (15.6 square kilometers) and includes several small islands and islets surrounded by a lagoon. The islands are covered in dense tropical vegetation, including coconut palms, pandanus, and various species of ferns.

The atoll is home to a diverse array of marine and bird life, including many rare and endangered species. The surrounding waters are inhabited by a variety of fish, sharks, and sea turtles, while the islands themselves are home to a number of species of seabirds, including the red-tailed tropicbird, the brown booby, and the sooty tern.

Palmyra Atoll has a rich human history, dating back to ancient times. Archaeological evidence suggests that the atoll was inhabited by Polynesian peoples as early as the 10th century, and later served as a stopover point for European explorers and traders. In the early 20th century, the atoll was used for commercial coconut cultivation and was briefly occupied by the U.S. military during World War II.

Today, Palmyra Atoll is a protected wildlife sanctuary and research station, closed to the general public. It is visited regularly by scientists and researchers studying the area's unique ecology and biodiversity. The atoll is also used for environmental education and outreach programs, aimed at promoting conservation and sustainable management of the Pacific's fragile ecosystems.