PrimeWire

You can now watch the entire National Geographic Megastructures Panama Canal Unlocked movie online in high-definition quality, complete with English subtitles for a better viewing experience. Best of all, there’s no need to download anything—simply stream it directly from your device anytime, anywhere.

It carries more than 14,000 ships a year over a nine-storey mountain range and some gigantic machines keep it flowing, including the world's biggest dipper dredge.