Great topic, but for me it was rather difficult narrowing it down to just three pictures. I could have posted a dozen pictures, but then again it's the chosing that makes this so much fun
So anyway, here's a variety of my close-ups...
A close-up of a blue iceberg in the disco bay, Greenland:
Two relaxing teenagers at the Pier, Kiel (Germany):
And a rainy day at the Lesueur National Park, Australia: