Travel Wild explores one of Australia's most remote destinations Christmas Island. Host Lin Sutherland has come here to experience some of Australia's most incredible wildlife encounters. Lin comes face to face with whale sharks, dolphins and sharks while exploring the stunning coral reefs of Christmas Islands. But the highlight of Lin's trip is being surrounded by hundreds and thousands of marching crabs in what is truly a world class wildlife migration the marching of the red crabs of Christmas Island. Christmas Island, officially Territory of Christmas Island, island in the Indian Ocean, about 224 miles (360 km) south of the island of Java and 870 miles (1,400 km) northwest of Australia, that is administered as an external territory of Australia. The island is the summit of an oceanic mountain whose highest point on the island is Murray Hill, rising to 1,184 feet (361 metres) in the western part of the island. The main settlement and chief port is at Flying Fish Cove on the northeastern part of the island. First sighted in 1615 by Richard Rowe, master of the Thomas, the island was named on Christmas Day 1643 by Captain William Mynors of the British East India Company. In 1887 specimens of soil and rock were collected by the men of HMS Egeria; the British naturalist John Murray analyzed the specimens and found that they were nearly pure phosphate of lime. In 1888 the island was annexed by Great Britain, and the first settlement was established at Flying Fish Cove by George Clunies-Ross of Cocos (Keeling) Islands. A 99-year lease, granted in 1891 to Clunies-Ross and Murray, to mine phosphate and cut timber was transferred six years later to the Christmas Island Phosphate Company, Ltd., which was largely owned by the former lessees. In 1900 Christmas Island was incorporated in the British crown colony of the Straits Settlements with its capital at Singapore. During World War II the island was occupied by the Japanese. In 1948 the governments of New Zealand and Australia acquired the interests and assets of the Christmas Island Phosphate Company, and the British Phosphate Commission managed operations for both governments. In 1958 the island became an Australian territory.