I've done most of the external things I've really wanted to do tripping:
While fucking
On a roller coaster
At the IMAX
At a water park
In a sensory deprivation tank
On the "Graviton" theme park ride where centripetal force holds you against the walls
Bungee jumping
Hang-gliding (tandem)
Para-gliding (tandem)
Sky-diving (tandem) (though that was just weed, all these others are on proper psyches)
In exotic locations (Nepal, Thailand s. islands, Brazil)
Snorkeling (almost did scuba, but decided against it and don't regret it)
In a Halloween-time massive highly elaborate haunted house/labyrinth
In an isolated pristine wilderness (kayaking to islands where only one person is permitted; backcountry in National parks)
While skiing
While water skiiing/tubing
In an inflatable castle
I recommend all of these things highly to anyone who has tried out less intense things while tripping and loved it.
I still want to go to this one water park I've seen on TV where you never have to walk. You just float in a tube tripping your ass off while conveyors transport you to the next slide. You can be extraordinarily fucked up and all you have to do is make sure you get in that tube and take it in. I also would love to go to a rave where people rented out a "Discovery Zone" type place with plastic tunnel mazes, water-floors, and ball cages.
And lastly, at some point in the future I hope there are private space cruises so I can dose with some friends in zero gravity. That strikes me as something worth spending any retirement money I might have accumulated on (If that means I can't live without tons of excess cash and I'm a burden on others, or things get so painful they're pointless to endure, I'll just off myself Hunter S. Thompson style ... why the fuck not?).
EDIT: And Christ, I want to do something like
this while tripping so badly, to seize control of life at the edge of death -- and amplify it with the best psycho-spiritual technology available. Do you understand?