Photo: Portal to Oblivion - Jamie Macisaac
This photo is amazingly shot. It was taken in Oregon by Jamie Macisaac.
To get this shot Macisaac needed a slow shutter speed to blur the water (about a second or so) as well as a deep depth-of-field. THe composition places this death-hole at the very center, but it feels as though it sucks you in (I wonder why...)
The foreground is perfectly sharp where the background has a slight blur. That means the depth-of-field wasn't very deep, but deep enough to have a soft blur, so perhaps at around f/8.