a juniper tree
... that a juniper tree in the median of Interstate 17 in Arizona is mysteriously decorated every year at Christmas?
... that <b id="mwArM"><a href="./I-17_Mystery_Christmas_Tree" id="mwArQ" rel="mw:WikiLink" title="I-17 Mystery Christmas Tree">a juniper tree</a></b> in the <a href="./Median_strip" id="mwArU" rel="mw:WikiLink" title="Median strip">median</a> of <a href="./Interstate_17" id="mwArY" rel="mw:WikiLink" title="Interstate 17">Interstate 17</a> in Arizona is mysteriously decorated every year at Christmas?