My high school in Alaska was a former Naval Air Station, it had lots of weird old buildings that were partly or fully disused. There were also WWII bunkers all over the place, we'd sneak off to explore them sometimes. That's actually what got me into UE!
Alaska has a lot of strange military stuff in general. Cold war radar bases, forgotten WWII artillery cannons, missile sites, etc. The whole town of Whittier was built as a semi-secret military port, and the entire population was crammed into two communist-style buildings due to the lack of flat land to build on. One of those buildings is now abandoned (and the whole town still lives in the other one). I have more of a story / write-up on that trip here:
http://drainfreak.com/df/whittier/ There's a very well-preserved Nike missile site near Anchorage. I hiked up there once or twice and poked around. We saw a bear and found a ton of dropped / lost "stuff" from military training (ammo, knives, spent smoke grenades, etc). Later the army found my website and published a briefing on trespassing at the site with some of my photos (lol).
My writeup / photos:
http://drainfreak....summit/missile.htm Some of our "loot" (I didn't consider it unethical, since all of this was just lying on the ground):
http://drainfreak.com/temp/stuff.jpg And our 15 minutes of Army powerpoint fame. Remember loose lips sink locations!
http://drainfreak.com/temp/trespass.jpg