An Australian man became the first to circumnavigate the world in an amphibious vehicle.

During WWII, Ben Carlin first saw amphibious vehicles in action when serving in India. After the war, he and his wife crossed from the US to Australia in an amphibious vehicle for their honeymoon – which they completed in 1951. By the time Ben Carlin completed his circumnavigation of the world, he had traveled 11,000 miles (17,000 km) by sea and 39,000 miles (62,000 km) by land.

Source