Lesotho has no coast on the sea nor on a lake. This type of country is called "landlocked", meaning it is surrounded by land. All of Lesotho's trade must either be flown in by aeroplane, or brought in by land. Lesotho's position is unusual: it is completely surrounded by South Africa and has no borders with any other country. This type of country is called an "enclave". Lesotho is one of the only three enclaved countries in the world (the other two are San Marino and the Vatican City). This makes Lesotho's relationship with South Africa very important to them both.