But I spawned into this world and that's what it reminded me of, so I built a bunch of random Far Cry-esque things on the island.
There's a small village and lots of ruins and WWII-era encampments
Feel free to explore the map, or use it to build your own adventure map/whatever.
There aren't really any secrets as of now.
I uploaded it to MC World Map to make it easy for everyone: http://www.minecraftworldmap.com/worlds/W5Gjh#/-67/64/27/-1/0/0