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“Riverworld is a fictional planet and the setting for a series of science fiction books written by Philip José Farmer (1918-2009). Riverworld is an artificial environment where all humans (and pre-humans) are reconstructed. The books explore interactions of individuals from many different cultures and time periods”
“Located at an indeterminate distance from the Sol system and millennia in the future, the Riverworld is an Earthlike planet whose surface has been terraformed to consist solely of one staggeringly long river-valley.”
"The story of Riverworld begins when almost the whole of humanity, from the time of the first homo sapiens through to the early 21st century, is simultaneously resurrected along the banks of the river. "
“In each area, there are initially three groups of people: a large group from one time period and place, a smaller group from another time and place, and a very small group of people from random times and places (most of the 20th and 21st century humans are spread across the river as part of this last group).”
Same departure point as for Gor:
I’ve read most of his works over the years, but don’t remember this one… which book/series is it, again?
(Yeah, I could Google, but what fun is that for you?)
Oh, I wouldn’t want to live there but it could be interesting to hang with a lighthugger crew for a while, seeing the different cultures on the worlds they visit. And depending on when you visited, seeing the Glitter Belt around Yellowstone at its peak could be fun.
i’d keep it simple, Flatland.
Far-seer, Fossil-Hunter, and Foreigner.
C.J. Cherryh’s Foreigner universe. I’d love to be the paidhi, actually, even though it would take massive years of study and I’d probably cause an international incident that would lead to a second War of Landing.
Forgot to say: I’d study…well…everything. The entire mindset that seems to not have a section for “emotional attachment,” the thought process of dividing the entire world and all interactions into felicitous and non-felicitous numbers…everything.
I think I’d go to Niven’s Known Space universe at about the time of Ringworld’s Children or thereabouts.
I’d check out all sorts of astronomical things, meet Kzinti, Jinxians, Wunderlanders, and any other sort of alien or odd human I could find, sleep between sleeping plates, take a spin in an autodoc and (presumably) have it make me thin and in perfect health, as well as fix my knee.
I’d generally be a far-future tourist- I wouldn’t try and make a life out of it. I think as long as I conceived of the trip as a really, really cool vacation, I wouldn’t be terribly depressed when I came back.
I don’t remember the name of the book, but I’m pretty sure it was written by Ursula le Guin. The planet was populated by a race of androgynous people whose genitalia are suppressed except in certain circumstances, and every individual can be either male or female depending on those circumstances.
In the book, a female human visited this planet on, I think, a diplomatic mission, and many of the inhabitants were disturbed by her femaleness and found themselves responding to it by expressing their male genitals in what was, to them, an inappropriate way.
The reason is that I would like to research how they would react to a gay male. Would my maleness be the overriding characteristic they would react to, or would some other factor (my complete disinterest in sex with women, the possibility that I might have some feminine side that they could sense) temper that reaction.
My other choice would be the universe of Alex Benedict, interstellar antiquities dealer, and his assistant and pilot Chase Kolpath, written by Jack McDevitt. Life there seems pretty sweet, and no-one seems to be hurting for money, and they have interstellar FTL travel without relativistic consequences. I don’t know what I would study there but there are apparently thousands of inhabited planets, so lots to study.
Roddy
I think a folklore expert or novelist would be more able to figure out the rules of Discworld than a scientist. Eistein ain’t never going to figure Narrativium out 
Me, I’d like to give a shot at the 'verse of Firefly, if only to understand how a deep cultural merger of Anglo-American and Chinese cultures can have no Asian people in it at all 
Can I visit, and just hang out?
I just know I’d forget to take notes.
I know you want a report on my return; can I give it verbally, over a flagon of Mudder’s Milk? (or maybe just a pint of Bendërbrāu, if I could be animated…)
The Left hand of Darkness, an amazing book.
My first reaction was The Fireflyverse (that’s where the Mudder’s Milk is from). But if I’m honest, there’s a place that’s been on my mind for decades longer.
***The Village. ***
(no, not M. Night Shama-lama-dingdong, Patrick McGoohan)
Ever since I waited for each episode of The Prisoner as a kid, I’ve been dying to sit and sip some tea at a cafe table while watching a Human Chess Match. And with an apartment like #6’s, I wouldn’t want to escape… I mean, c’mon, you don’t even have to open your own door!
And if you doubt that it counts as Sci-Fi, watch a few episodes… it veers into Awkward Sci-Fi pretty regularly.
Be seeing you!!
And you . . .
The Land from Stephen R. Donaldson’s Chronicles of Thomas Covenant, preferably in the years just prior to the arrival of Covenant.
How cool: woodlore, gravelers, Bloodguard, Lords of the Land, Ranyhyn (although it’s doubtful the Ramen would let me near them), and Giants!
Being of an artistic bent, I think I’d like to spend some time in Vermillion Sands, though I wouldn’t want to rent or buy Stellavista.
I once read a short story about a man who happens to talk to an extra-terrestrial professional explorer of fictional worlds in a bar. The explorer has a couple of years’ sabbatical leave and wants to do some exploring just for himself and the fun of it, so the man tries to pull his leg and tells him about a world called Marmeladia and extols its virtues.
The explorer sets off and teleports himself to this wonderful world. It was quite dark there and the landscape was rather dull consisting mostly of long grey ridges. However, he begins to work and starts digging in the ground to find out what it was made from and decides that he will have no problems finding something to do during the next five six years.
The man, however, gets a tremendous head-ache because, you see, Marmeladia only existed in his brain.