Lukla airport in Nepal is extremely difficult to land. The runway is I believe less than a 1000 feet in length. It has a massive peak at the end. Actually, it is built on Mountain. So, when the plane lands, it is at about 20-40 degrees (something like that) inclined. So the plane (turbo prop) lands at pretty good speed and comes to a complete stop at the END (infront of the mountain). For takeoff, the plane gets to full power and with the great slope, it takes off. If for some reason it is unable to take off, off it goes down several 1000 feets!!!
U gotta see this airport, search for Nepal and when the photos come up, see Lukla's photos.