BUSSIGNY, Switzerland -- In November, Switzerland voted to ban the construction of new minarets, the towerlike structures that adorn mosques. A week or so later, in an apparent act of defiance, a new minaret unexpectedly sprang up here.

But the new minaret is not attached to a mosque; this small town near Geneva doesn't even have one. And it's not the work of a local Muslim outraged by Switzerland's controversial vote to ban the structures, which often are used to launch the call to prayer.

Instead,...