I made a creative world so I could explore easier and also not fear the many mobs.
Something that I'm really pleased with is that there are actually bodies of water deep enough to be considered seas. I was flyin' over water for a seemingly long time, and there was no sight of land except for a few deserted islands. I turned view distance to full, accelerated the time til sunset and good a good picture
I also saw a huge overhang that had some floating blocks around it. It looked like a gigantic archway except it was only touching the ground on one side.
A fair distance on, there's a ravine that lead to a mine shaft which, in turn, leads to a forking HUGE cavern (easily 40 blocks high) which contained a large amount of cobwebs and a blue spider spawner. Blue spiders are cute when you're invulnerable
All in all it looks like the chunk generator has been spun into overdrive, creating hugely vast, grand, synonyms of big, applejuice landscape that makes it feel a whole lot more like ADVENTURE!
I was gunna upload my screenshots of said situations but the board does not allow PNG's greater than 500kb. Oh wheel.