Kiritimati or Christmas Island's a Pacific Ocean atoll in the northern Line Islands and part of the Republic of Kiribati. The island has the greatest land area of any coral atoll in the world: about ; its lagoon's about the same size. The atoll's about in perimeter, while the lagoon shoreline extends for over . Kiritimati comprises over 70% of the total land area of Kiribati, a nation encompassing 33 Pacific atolls and islands. It lies north of the Equator, from Sydney, and from San Francisco.… (More on Kiritimati)