The Croatian town of Hum is either the world's smallest city or town, depending on who you ask. Regardless, it's a beautiful town with 30 residents.
Another contender for the world's smallest city is Belgium's historic Durbuy. King John of Bohemia granted city title to it in 1331, although its 400 citizens are outnumbered by tourists most of the year.
The Maltese capital's Baroque architecture attracts tourists, and it was named a UNESCO World Heritage Site in 1980. Founded in the 1500s, the little capital has 6,000 residents.
In the microstate of San Marino, Emilia-Romagna and Marche surround the mountaintop city. With slightly over 4,000 residents, the picturesque medieval settlement covers 2.74 square miles (7.09 square km).
Some of the picturesque Azores islands have more cows than people on the windswept Atlantic Ocean archipelago! Horta, the capital of Faial Island, has 7,000 people (excluding cattle).
Castries, Saint Lucia's Caribbean city, is busy. Tourism and outlying village visitors boost its 22,110 people.
Belmopan is the smallest capital in the Americas, although it is growing fast with 20,000 citizens. After Hurricane Hattie destroyed much of Belize City in 1961, it's a new settlement.
That's not a typo. Although London has millions of people, the City of London is a little city within it. Since the medieval period, the 1.12 square mile (2.9 square km) community has had city status and its own police force.
Vatican City is the world's smallest country and city, surrounded by Rome. The Pope and 800 other people live in the 0.17-square mile (0.44 square km) city-state, the Roman Catholic Church's headquarters.