Airports with unique topographies, difficult runways and unusual approaches make take-off and landing operations extremely hazardous. Airport-technology.com picks the airports with the world's most dangerous landing and take off conditions. Tenzing-Hillary Airport, Nepal Tenzing-Hillary Airport, also known as Lukla Airport, located in the town of Lukla, Nepal, has a tiny runway surrounded by precipitous mountains at an elevation of 2,860m.