The infinity of space. I wonder how could somebody not be interested in it.
All the wonders which must be outthere, all the phanomenons we have not
discovered yet. We are just at the beginning of space travel, I wish I could
look a few thousand years into the future to see what we will have accomplished
by then (that is, if we survive the next few hundred years, which isn't sure, 
looking at out current level of stupidity...)