Seed Code: 8675309
To quote Stewie:
Looked like a normal world spawn until I wandered over a hill and saw the tower on the right side of the preview image.
X: 209 / Y: 68 / Z: 206
Massive overhangs and floating islands with lake below
X: 273 / Y: 73 / Z: 85
Saw this from on top of the overhangs and though it was a deep chasm... just spirals a bit down... but there's IRON!
X: 408 / Y: 69 / Z: 512
A naturally open and DEEP cave system that splits in two directions. Had a single floating gravel block before I made the stairs to get out this way.
There's also a stone slope nearby.
X: 440 / Y: 98 / Z: 737
A mountain of exposed stone!