Istanbul Is in Two Continents. It Gets Weirder.
Istanbul straddles two continents. Tunis and Palermo are separated by a short stretch of Mediterranean but sit on different continental branches entirely. Havana is technically in North America.
This tree classifies 180 cities by where they actually sit: continents, subcontinents, regions, countries. Physical proximity creates connections you wouldn't expect — Toronto and Mexico City share a continent but almost nothing else. São Paulo and Lima are both in South America but separated by the Andes and the Amazon.
The Europe-Asia boundary is partly convention. Where does one end and the other begin? Oceania adds its own twist: Sydney and Auckland are neighbors but sit in distinct subregions. Every guess is a geography lesson — not in kilometers, but in the structure of where places sit on Earth.
Did you know?
- *Istanbul is the only major city in the world that spans two continents — Europe and Asia.
- *Africa has 54 countries but is often underrepresented on world maps due to the Mercator projection distorting its true size.
- *Reykjavik, Iceland is the northernmost capital of a sovereign nation, sitting just below the Arctic Circle.
- *More than half of the world's population lives in Asia, and the continent contains over 50 cities with populations above 5 million.
- *Australia is both a country and a continent, with most of its major cities clustered along the eastern and southeastern coasts.
What is GuessKin?
GuessKin is a free daily guessing game built on real-world taxonomy. Choose from over 20 categories and try to identify the mystery city. Each guess reveals how closely related your answer is to the target through a shared classification tree.
How does it work?
Every city in GuessKin sits on a taxonomy tree — a branching hierarchy that shows how things are classified and related. When you make a guess, the game shows you the nearest common ancestor between your guess and the answer. The closer that ancestor is to the answer, the warmer you are. The tree visualization grows with each guess, narrowing down where the answer lives and helping you triangulate.
How to get the best score
- •Fewer guesses is better. The ideal game is guessing it in 1. Every guess counts against your score.
- •Speed matters too. The timer starts on your first guess. Quick, confident answers are rewarded.
- •Read the tree. Each guess gives you real taxonomic information. Pay attention to which branch the answer is on and which branches you've already ruled out.
- •Start broad, then narrow. Your first guess splits the tree. Pick something that gives you maximum information, then drill into the revealed branch.
Each GuessKin category uses a real classification system. These aren't made-up groupings — they're the same systems scientists and specialists actually use. New categories are added regularly. Every category is free, with no accounts and no ads.