Southern England has all that, plus abundant natural resources, no volcanoes, no earthquakes, and next to no tsunamis.
Isn’t the climate a lot milder in Northern CA/OR than southern England? Other points make sense, except I think that region also has plenty of natural resources.
Not in Southern Africa (AKA The Cradle of Mankind) - none of that here.
But Southern Britain gets my vote as it has better mineral resources in a smaller area.
Although I don’t favour splitting up into too many subcolonies - a two- or 3-way split seems optimal…
Kit to bring - this is a whole warehouse, so I’d bring a couple of small wooden sail boats in addition to all the farming/building/knowledgebase stuff everyone else said. Definitely horses and chickens. Either goats or sheep. Dogs & cats.
And I’d go if I could go with my wife and kids.
Some of the valley areas of inland Colombia get my vote. Travel via river is feasible.
Loads of mineral resources. Major coal reserves. Significant oil resources once the population grows to that point.
Temperate weather due to altitude. Amazing variety of microclimates good for raising all sorts of agriculture goods and livestock year-round.
What about mosquitoes and malaria?
Malaria is an African disease, as are dengue, West Nile and Yellow Fever, the other major mosquito-borne killers.
Is this a joke? Malaria and dengue are endemic in many South and Central American areas, as is Yellow Fever which just about made the Panama Canal project un-doable. See the CDC website for maps of each.
ETA: I admit I don’t have data on the locations of these diseases 1 million years ago, though.
Dengue is not widespread at the higher altitudes where temperate climate is found.
By going tropical but to a higher altitude you can get the benefits of a year round growing season with more moderate temperatures.
Well according to Wikipedia, the parasite that causes malaria is 50-100 000 years old and it’s spread was greatly aided by human agriculture (more standing water for mosquito breeding). I reiterate what I said above: we’d be pretty uncertain what kind of diseases we’d be facing. You cant talk about the diseases we know now what region would be good. Many of the diseases we worry about developed along with humans. The diseases of this unspoiled Earth never saw a human. A very knowledgeable and equipped medical group would be required.
But those diseases have also no exposure to our antibiotics, so they haven’t developed resistance to them.
It’s controversial because pre-Columbian records are sparse, but there’s reason to think that malaria didn’t make the jump across the Atlantic until Europeans started the slave trade: http://www.pnas.org/content/109/2/511.abstract
They were all brought there post-1492. They would not exist in Colombia if you jump straight there (and don’t bring them from your Earth, of course).
Botflies, on the other hand…
What’s the minimum tech level to keep manufacturing antibiotics, though? The hypothetical colony is going to have to say goodbye to a lot of modern medicine, sooner or later.
'30/'40s tech is all you need. Probably not even that. If you travel there with the right cultures all ready, you should be able to sustain and increase them in (sterile) clay pots and the like. It’s identifying and testing the cultures that were the initial hurdle, then developing the best growth medium. That work’s all been done, so in the ||earth, it’s sustaining the cultures that will be all the work. Think of it like having several sourdough starters on the go at once, kind of thing.
I imagine a position like Keeper of the Cultures will be a socially significant one.
Of course, eventually the ||earth microbes will evolve resistance, but hopefully by then the colony will be at tech levels that permit research into new strains.
I like your way of thinking; ten is good. Like the ten kings of Atlantis. Perhaps Atlantis is still above water in this side-earth. So that’s where I’d go, in search of the island of Atlantis. There, each group will have its own king and lots of land, with plains and mountains, rivers, lakes, etc. As described, the island itself provides most of what is required for the uses of life. Supposedly, there was an abundance of wood for carpenter’s work, and sufficient maintenance for tame and wild animals. Moreover, there were a great number of elephants in the island; for as there was provision for all other sorts of animals, both for those which live in lakes and marshes and rivers, and also for those which live in mountains and on plains, so there was for the animal which is the largest and most voracious of all. Also whatever fragrant things there now are in the earth, whether roots, or herbage, or woods, or essences which distil from fruit and flower, grew and thrived in that land; also the fruit which admits of cultivation, both the dry sort, which is given us for nourishment and any other which we use for food-we call them all by the common name pulse, and the fruits having a hard rind, affording drinks and meats and ointments, and good store of chestnuts and the like, which furnish pleasure and amusement, and are fruits which spoil with keeping, and the pleasant kinds of dessert, with which we console ourselves after dinner, when we are tired of eating-all these that sacred island will offer us , if it still beholds the light of the sun. This awaits us, fair and wondrous and in infinite abundance, if we find the island above water, still. And so with such blessings the earth there gives, we can feel more at ease with taking less with us on the trip.
That took a turn…
Yeeessss…
If I’m part of a small colonising expedition that likely needs every pair of hands doing their part to keep us alive, I’m probably not looking to punt everything on the chance of finding a mythical island when there are a number of known locations that will serve us very well. That may mean passing up on elephants for a long time to come, but I think I can live with that.
Not if you choose Southern Africa 
Second-nicest weather in the world (after Hawaii) and elephants.
-
Probably head for the Fertile Crescent, but would want to make sure the climate there is what I think it is/was a million years ago. Similar stipulation for any other location–what is desert/lovely today may well have been lovely/desert at the target site. Also, maps describing all land masses on the planet and known resources/climates so we know where to head next when we need something.
-
As mentioned above, multiple copies of written & environment-protected “how to” books. Specific hardware would be geared for reliability and aimed at developing’ green’ industrial infrastructure–clearly, we’re gonna have to burn a bit of coal to get there, but that sort of thing needs to be a temporary means to a cleaner end.
-
I’d go, but I’d really prefer everyone be screened for religious leanings and eliminated. Not to paint with too broad a brush, but for all the good things religion has given us, the barbarity perpetuated in the name of “proper” worship vastly overshadows the good. Perhaps faith alignment or even diversity can be conditions for one of the other sister ventures into a different universe, but not mine, please.
Out of curiosity – why the insistence on agriculture? In the right spot, hunting, fishing, and gathering can be a very easy way to make a living.