Since 1961, the twin island country of St. Kitts and Nevis has shrunken by more than 25 percent. This dramatic land loss can be attributed to regular erosion and natural disasters, notably Hurricane Luis, Hurricane Georges and Hurricane Lenny.

Ecuador has experienced a 10 percent change in land area over the past 52 years, placing it second on the list, according to Travel Stats Man. Vietnam and Bulgaria come third and fourth respectively.