All of the above. Any of the above. And don’t forget “feet.” (A more specific answer requires knowing what country is being crossed. The plan of attack for crossing Singapore is much different than for crossing Russia.)
Being a traveler who lives abroad, the answer is simple: “Where are you from?”
As a traveler, I can’t grasp tribal / jingoistic people’s obsession with where one fell out of one’s mom, and it always feels a bit xenophobic — as though, noticing one’s foreignness, there is a rush to determine whether one is one of the tolerable foreigners or one of the really bad ones.
As an introvert, the question offends my preference to be talked to by people who have something to say, and to be left alone by people who are just playing out social programming with the objective of breaking silence that they find objectionable (but which I, as a rule, find delightful.) (Even being highly introverted, I can converse for hours with someone who has something to say on a topic that is neither themselves nor me — i.e. I love ideas but hate small talk and interaction for the sake of interaction.)
Plus, it just gets annoying being asked the same question sixty times a day when I’m in more remote parts — a question, the answer to which will be forgotten in three minutes and is merely sound for sound’s sake. In the unlikely event that one hopes to have an actual conversation with me, one must start with something that is not your culture’s default socially programmed question. One must get to at least the second most commonly asked question, a question varies from person to person (in my case, it’s: “Why are you such an asshole?”)
From this hour I ordain myself loos'd of
limits and imaginary lines,
Going where I list, my own master total and
absolute,
Listening to others, considering well what
they say,
Pausing, searching, receiving,
contemplating,
Gently, but with undeniable will, divesting
myself of the holds that would hold me.
I inhale great draughts of space,
The east and the west are mine, and the
north and the south are mine.
I am larger, better than I thought,
I did not know I held so much goodness.
All seems beautiful to me,
I can repeat over to men and women You
have done such good to me I would do
the same to you.
I will recruit for myself and you as I go,
I will scatter myself among men and women
as I go,
I will toss a new gladness and roughness
among them,
Whoever denies me it shall not trouble me,
Whoever accepts me he or she shall be
blessed and shall bless me.
Passage O soul to India!
Eclaircise the myths Asiatic, the primitive
fables.
Not you alone, proud truths of the
world,
Nor you alone, ye facts of modern
science,
But myths and fables of eld, Asia's, Africa's
fables,
The far-darting beams of the spirit, the
unloos'd dreams,
The deep diving bibles and legends,
The daring plots of the poets, the elder
religions;
O you temples fairer than lilies, pour'd over
by the rising sun!
O you fables, spurning the known, eluding
the hold of the known, mounting to
heaven!
You lofty and dazzling towers, pinnacled,
red as roses, burnish'd with gold!
Towers of fables immortal, fashion'd from
mortal dreams!
You too I welcome, and fully, the same as
the rest!
You too with joy I sing.
Passage to India!
Lo, soul! seest thou not God's purpose from
the first?
The earth to be spann'd, connected by
network,
The races, neighbors, to marry and be given
in marriage,
The oceans to be cross'd, the distant
brought near,
The lands to be welded together.
A worship new I sing,
You captains, voyagers, explorers,
yours,
You engineers, you architects, machinists,
yours,
You, not for trade or transportation only,
But in God's name, and for thy sake, O
soul.
Tiger Riding for Beginners 