Istanbul is a city with districts on two different continents, Europe and Asia.

The longer version

A strait cuts through the land, connecting one sea to another and separating Europe from Asia. A city grew on both sides because the narrow waterway offered a defensible crossing point and a natural harbour. Bridges and ferries now link the two halves, and daily commuting between them is routine.

The waterway carries shipping between the Black Sea and the Mediterranean, making it one of the busiest passages in the world. Currents flow both ways at different depths, with saltier water moving along the bottom. Being on two continents is a geographical label rather than a legal one, since the city functions as a single metropolitan area with one administration.

Where this entry sits

These facts wander across maps, borders, deserts, rivers, mountains, and the extreme corners of the natural world. Each one is short and self-contained, offering a small surprise about places you may never visit rather than anything you actually need. The full list sits on the Geography page, where every entry is listed in order.