If I had to choose a number 1, one place I want to go to / see more than all others, I think it would be Area 51. I've been kinda intrigued / obsessed ever since the first article or documentary I saw years (decades?) ago. (No, I don't believe there are aliens there.)
But other than that:
Not quite narrowed down to only ten. In (more or less) alphabetical order:
Africa (Serengeti/Wildebeest migration, Kruger)
Alaska (Drive the Dalton Highway, watch the Grizzlies feeding)
Amazon rain Forest / Iguazu falls (I think these are totally separate, but somebody upthread combined them, so I will too)
Antarctica
Australian Outback
Banff/Jasper (I can't even count how many trips I had planned here but every time it ended up not happening for some reason.)
Canadian Ice Roads (Does this even count as a place?)
Climb Mt. Whitney (Not quite as sexy as K2 or Everest, but this I actually intend to do sometime within the next few years.)
New Zealand
Sahara Desert
the Alps
I would include Hawaii, but I already have a trip planned
Iceland / Northern Lights - done! (though I'm not quite sure why "Northern Lights" is a destination...)
Cross-USA road trip -done x9!!
Also
#5 - Norway > Banff. As far as I can tell, there's isn't anyhthing in Banff that can't be had in Norway, only better and more awesome. Plus Norway has the fjords, the islands, and the ocean (and polar bears, in Svalbard).
Ok, I'm convinced. I'm updating mine:
Replacing Banff with Norway as SF explained above.
Replacing the Alps with ROR. No explanation needed.
If I had to choose a number 1, one place I want to go to / see more than all others, I think it would be Area 51. I've been kinda intrigued / obsessed ever since the first article or documentary I saw years (decades?) ago. (No, I don't believe there are aliens there.)
But other than that:
Not quite narrowed down to only ten. In (more or less) alphabetical order:
Africa (Serengeti/Wildebeest migration, Kruger)
Alaska (Drive the Dalton Highway, watch the Grizzlies feeding)
Amazon rain Forest / Iguazu falls (I think these are totally separate, but somebody upthread combined them, so I will too)
Antarctica
Australian Outback
Canadian Ice Roads (Does this even count as a place?)
Climb Mt. Whitney (Not quite as sexy as K2 or Everest, but this I actually intend to do sometime within the next few years.)
New Zealand
Norway
PalauSahara Desert
Iceland / Northern Lights - done! (though I'm not quite sure why "Northern Lights" is a destination...)
Cross-USA road trip -done x9!!
Hawaii -done
Kalalau trail -done x2/12 
Also
What I really want to go see is the Trinity test site in the white sands missile range. Unfortunately they only have public tours two days a year and always on Shabbos 
