The Australian adventurer Ben Carlin became the only person to circumnavigate the world in an amphibious vehicle, having travelled over 80,000 kilometres (50,000 miles) by land and sea.

Frederick Benjamin Carlin was an Australian adventurer who was the first person to circumnavigate the world in an amphibious vehicle. Born in Northam, Western Australia, Carlin attended Guildford Grammar School in Perth, and later studied mining engineering at the Kalgoorlie School of Mines. After qualifying as an engineer, he worked on the Goldfields before emigrating to China in 1939 to work in a British coal mine. In World War II, Carlin was posted to the Indian Army Corps of Engineers, serving in India, Italy, and throughout the Middle East. After his discharge from service in 1946, he emigrated to the United States with his American wife, Elinore.

Circumnavigation is the complete navigation around an entire island, continent, or astronomical body. This article focuses on the circumnavigation of Earth.

An amphibious vehicle is a vehicle that works both on land and on or under water. Amphibious vehicles include amphibious bicycles, ATVs, cars, buses, trucks, railway vehicles, combat vehicles, and hovercraft.