Panama connects the two American continents while separating two great oceans, the Atlantic and Pacific.

The longer version

An isthmus is a narrow strip of land joining two larger masses. Panama formed as volcanic activity and sediment built up a bridge between the northern and southern halves of the Americas. Once the link closed, animals could walk between them, an event that reshaped ecosystems on both sides.

The strip also blocks ocean currents that once flowed between the Atlantic and Pacific, redirecting warm water and influencing global climate patterns. Its narrow width makes a canal practical, allowing ships to avoid a long voyage around the continent. Locks raise vessels over the interior before lowering them again.

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.