Burning of the Böögg: Where does it come from?

The Burning of the Böögg is happening Tuesday at the Alpenfest in Gaylord.

It's an opportunity to put your troubles on paper, slip them inside the Böögg and watch them go up in smoke.

The Burning of the Böögg is a main event of a spring festival in the largest city of what country?

Is it Germany, Poland, Switzerland of the United States?