Connects the Mediterranean Sea (north) to the Red Sea (south) — 193 km, no locks, sea-level passage.
Connects the Atlantic Ocean (via Caribbean Sea) to the Pacific Ocean — 82 km, three lock complexes (Gatun, Pedro Miguel, Miraflores) lifting ships 26 m over the Continental Divide.
Suez: Europe–Asia route (saves ~6,000 km vs. Cape of Good Hope). Panama: Atlantic–Pacific route (saves ~13,000 km vs. Cape Horn). Both are critical chokepoints for global trade.