This is my entry to the One Chunk Challenge.

Made in about 2 days, the aim was to build a world in the given chunk, but not just anything - I tried to include both the overworld and Nether in one, and boy was it challenging.
The terrain and landscaping weren't hard, but trying to fit all of the new Nether biomes (and structures) in a single chunk proved quite difficult - in the end, I left out the Nether Wastes.
Up top, I built one of my 8x8 houses with everything in it - the front of the house has a large clock face-like area, but it is not a clock. Instead, it's a circuit that, as night approaches, it mimics an eye opening by turning on specific sets of Redstone Lamps - as it turns to dawn, it does the opposite.
I also used some Barrier Blocks outside the chunk boundaries to avoid the water and lava spilling out and potentially causing problems - hopefully that doesn't end up disqualifying me in the end.

I guess that's it. Good luck to everyone else who enters the competition.