Visiting The Long Earth

I've just been reading The Long Earth, by Terry Pratchett and Stephen Baxter, which was very good.
The premise is that there are a multitude of alternate Earths to either side of our Earth, with the important difference that none of these other Earths have any humans in them, and now people have discovered how to visit those other worlds by means of a simple device called a Stepper.
Some people wander the worlds, others head out in groups like the old Wild West wagon trains.
The book mentions a problem also talked about by Charles Stross, in his Merchant Princes series - secure places are no longer secure when you can Step one world over, walk to the middle of the place you want to get into (for instance Fort Knox) and Step back into this world, right into the bank vault. Though in Charles Stross's books only particular families have the ability to step between worlds, and all the worlds are inhabited.
I started thinking about what I would want to see if I could Step to another Earth - and came to the conclusion that there would be nothing much out there that I would want to visit. It would be interesting, of course, to see the Wye Valley in its primal glory, filled with ancient woodland. But when I go out into the wilds, I'm looking for the signs of ancient habitation, the stones and banks that show that people have lived in that landscape before - and in the Long Earth there is no archaeology, because there have never been people.