Ah, lovely meadows green and wide!
Grasses are growing, grasses are growing.
Ah, lovely meadows green and wide!
Growing so high on every side.

CHORUS: Water from mountain flows (or Streams from the mountains flow)
Melted from winter snows
Turning it gaily goes
Circling the maple tree
Water from mountain flows
Melted from winter snows.
Turning it gaily goes, calling to me.

It's Polish. I grew up around Chicago, and Chicago has the world's largest population of Polish people outside of Poland. It was considered de rigeur to know this song.

I was singing it for my DH the other night, and it occurred to me that I wished I knew more verses.