With a new course opening in Illinois this summer, FootGolf is the latest crazy golf variation, following closely on the heels of other sports like Frisbee Golf. It's been around "since forever", according to the American FootGolf League.
In the game, you play golf with a soccer ball, almost exactly like regular golf on a much larger scale. The game has spread to over 30 countries, and each one does have slight variations on the rules. Some countries even have man-made obstacles in the way, sort of like FootMiniGolf.
In 2012, the first world championship was held in Hungary. Unless you live close to a course, your best opportunity to play would probably be on a visit to the city of sin, Las Vegas. There's a full sized course there.