6. Barra Airport — Scotland

Located on a remote island in Scotland’s Outer Hebrides, Barra Airport is the only airport in the world where commercial planes land directly on a beach. There are no paved runways—just packed sand that’s exposed at low tide.
Flights can only operate during daylight and low tide, and schedules change daily depending on the moon. The weather is often stormy and unpredictable, making every flight a calculated risk.