How many sacred places are there in the world?
There is only one, but it is VERY big.
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It would depend on how you define "sacred". If you were a
moderate adherent of any of the three great world religions of
Judaism, Christianity, and Islam, you might share common ideas of
which places are sacred. If you were a member of a radical sect of
any of those religions, you might consider the purportedly sacred
places of the other two to be profane. Secular persons or those
with religious or spiritual views differing from those of the big
three religions might consider all places everywhere sacred, or
only certain places, based on such widely varying and even
conflicting criteria that the word "sacred" can have no functional
meaning for this question.
Even if one were to be specific and ask, "How many sacred places
are there, according to Islam?" it would be very difficult to give
an exact answer, as varying sectarian belief would differ on which
sites are sacred. This would apply to any religion, not just the
big three religions.
The only meaningful operational definition of "sacred" is
"whatever you personally, or you and your co-believers as a group
deem sacred". Unfortunately, using that definition, the question
itself becomes one that only you personally, or you and your
co-believers as a group, can answer for yourselves: "How many
places in the world do I/we deem sacred?"