... have sex at the highest possible altitude on earth, where would you go? Be realistic about whether you'd be able to do it there.
Can anything top this? They set the standard. http://news.ninemsn.com.au/world/8367323/skydiving-sex-stunt-pair-will-not-be-charged Site does contain video NSFW
I'm more interested in going down. I like deep cavern exploration. Nothing like a dark, wet trench that no one has plumbed the depths of.