You spawn on a swamp biome next to a desert with sand (of course), a village, cacti, water, sugar canes, a cave, and oh my, a house with a dungeon inside it!
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Click the "read more" for more screenshots and info.
In case you don't spawn next to the village, the coordinates are x = 350, z = 245.
The chest in the dungeon-house contains 5 strings, two buckets, and two iron ingots.
This works at least in 1.9 pre 3 and pre 4, please comment if you find this working in previous versions as well.
