I've seen some pretty interesting fields flying in the Navy. My favorite is Gibraltar. About 6000', 1/3 of the runway extends out into the water, they have to stop traffic that runs from the border in to Gibraltar since it crosses midway through the runway, watch out for Spanish territorial airspace since they don't like the fact that the UK has a prime piece of property right in their backyard, and oh yeah, don't forget about the big rock just to the south of the runway.
Overall, just an awesome place to fly into, and not a bad place to hang out at night.