Underwater Highway Built in Korea – Documentary A fascinating episode of Megastructures – Deep Sea Highway, shows us how they build a underwater highway in Korea. Facebook Prev Article Next Article Documentary Checkout these cool gadgets... Related Posts If We Had No Moon… The Hawking Paradox The Best Documentary about Einstein Ancient Aliens – Aliens and Forbidden Islands Neil deGrasse Tyson on Science, Religion, Universe California City: The Largest City Never Built