From Malacca to Hormuz, the world’s narrow sea lanes—called straits—carry immense geopolitical weight. Though slim, these maritime chokepoints control critical trade routes, global oil flows, and military movement. Seven such straits are particularly vital today, influencing everything from energy prices to regional tensions and climate adaptation.

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• Strait of Hormuz handles 20% of global oil, 25% of LNG; any threat spikes global energy prices
• Strait of Malacca transports 25% of world trade; narrows to 2.8km, piracy & China tensions
• Gibraltar Strait connects Atlantic to Mediterranean; 100,000+ vessels pass each year
• Bosphorus in Istanbul links Black Sea to Mediterranean; critical for East–West energy trade
• Strait of Magellan in Chile, once safer than Cape Horn; long, icy, strategic but unpredictable
• Hudson Strait in Arctic Canada sees extreme tides; freezes in winter, blocks navigation
• Danish Strait (Greenland-Iceland) home to giant underwater waterfalls; Arctic’s hidden link
• Straits are power points—narrow but central to global shipping, conflict, and diplomacy
• Control of straits equals leverage in global trade and military reach
• Rising climate risks and conflicts make these maritime routes more contested than ever