I would go moon walking or something. Of course i would love to do that sober first. Then while i am trippin nuts and peer into the universe. You get a better view without an atmosphere. Mabey aliens would abduct me...lol
Holy crap, I couldn't imagine tripping on top of Chirripo. I did the hike to the top, took about 4 hours. Made out with my girlfriend on top. Was rather cold up there, but the peak is so small. I'd say no more than 20 people could comfortably chill up there. But it would be an amazing trip.
One of the best places I've ever taken acid was here: (Google Maps link). Our congregation of six gathered there with mattresses, sleeping bags, acid, pot and munchies, and watched the sky explode. No really; it was the night of the peak of the Orionid meteor shower that year. It was one of the most uplifting experiences of my life.
As well as the meteor shower, since we dropped just before midnight, we got to experience dawn from the top of the cape - that was breathtaking. The openness of the view, being surrounded by nature, with some of my closest friends... truly there are no better times than these.
Edit: You can right-click the image near the text "Conservation Park" and select "What's Here?" in Google Maps, and it will show two photos, one of the lighthouse, and one of the view (there are better views facing the inside of the island though)
I guess ill be the outsider and go with the darker side of things. I have yet to find a physical location, but something perhaps reminiscent of half-life 2. I tend to enjoy darker things when i trip, likely because of my partiality to dissociatives. I would love to be Gordon Freeman on some Ketamine.