Thank you very much to everyone for participating in the contest, but not so grateful due to the high quality of their contributions, have caused me a hard job choosing only a few images as winners.
Starting with the HM, these are in no particular order:
Flo with her colorful umbrella
Maaike and this picture of a black hole inside a building
Nick and his beautiful image of a dandelion seeds against the sun
John C. and this great image of two spaceships
Ken and this stunning view of the hotel, great composition
THIRD PLACE
Sandi and this caption of geometry in nature, an interesting foreground coupled with a big pyramid in the background
SECOND PLACE
Mike and his beautiful capture of an M.C. Escher type view: What is up, what is down?
FIRST PLACE
Dennis with an image that sums up all I was looking for in the contest: perfect geometry plus great composition plus great colors. You really has gotten all of us inside the balloon Dennis, so now it´s up to you to get us out of it with a new contest