Nor is the Vatican where you think it is. Vatican City’s borders are remarkably fuzzy for a country this tiny. When we say tiny, we mean tiniest: The Papal State is accoladed as the world’s smallest sovereign state, and it is – if you discount those lacklands, the Knights of Malta. Vatican City, completely enclaved within Rome, comprises no more than 108 acres, which is 1/6th of a square mile, or 0.44 of a square km. The second-smallest state, Monaco, is almost five times bigger – huge by comparison
Source: Strange Maps | Big Think.