9. Juancho E. Yrausquin Airport — Saba, Caribbean
Holding the record for the shortest commercial runway in the world—just 1,312 feet—this airport is literally perched on a cliff edge. The landing strip is surrounded on all sides by steep drops into the sea. There’s no room for second chances here. If a pilot doesn’t land perfectly, there’s no opportunity to abort. That’s why only specially trained pilots can fly to Saba.