The term 'Pleasant Island' is a reference to the island nation of Nauru, which is located in the South Pacific Ocean. Nauru is the smallest island nation in the world, with an area of just 8.1 square miles. It is also the least populous country in the world, with a population of just over 10, 000 people. Nauru is known for its phosphate deposits, which have been mined since 1907. The island is also home to a number of unique species of birds, reptiles, and plants.