Mystery #1

At a North Texas school
where monsignors rule,
at the corner where John and Tom meet,
there's an arch and swirl,
duck feathers unfurled,
and a tree that appears to have feet.
You should sit in the bricks
of a strange swirling mix
and look for multiple trunks.
Among them you'll find
neither pennies nor dimes,
but a treasure in much larger hunks.