10. Paro Airport — Bhutan
Nestled in a deep Himalayan valley, Paro Airport is surrounded by mountains over 18,000 feet tall. Only a handful of pilots worldwide are certified to land here due to the difficulty of the approach.
Planes must weave through mountain passes, making sharp turns at low altitudes before lining up with the short runway. Weather conditions change rapidly, adding an extra layer of stress to every arrival.