If you see a fairy ring:

If you see a fairy ring

in a field of grass,

very lightly step around,

tiptoe as you pass,

last night fairies frolicked there,

and they’re sleeping somewhere near.

If you see a tiny fay

laying fast asleep,

shut your eyes and run away,

do not stay or peep

and be sure you never tell,

or you’ll break a fairy spell.

                                     -William Shakespeare.