The most memorable award definitely has to go to the airport of Saba, a tiny island in the Dutch Caribbean, about 20 minutes flight from St. Maarten. The airport is built on a piece of rock connected to the island (which is really just one big mountain) with water on three sides. The runway is so short that it appears that your plane appears to fall first for a few seconds after leaving the runway, before they start climbing!
The airport can only be used by specially qualified pilots, in prop planes. The arrival and departure terminal is barely a shack, and you can only fly their from places like St. Maarten and St. Eustatius (another small Dutch Caribbean island).
However - Saba itself is a beautiful little island with excellent diving!