Today's Geo Quiz -- casts a long shadow. A sundial or shadow clock measures time by tracking the position of the Sun.

Sundials were used in ancient Greece and Egypt. But our quiz doesn't go that far back. We're looking for the world's biggest sundial. OK -- there's a few biggies around.

The one at Disney World in Florida used to be the biggest in the world. But now there are other contenders for the title.

One is in India.

We're looking for the other one -- in Sweden. It's in a town just north of the Arctic Circle. Not much sun there -- this time of year -- but plenty of music.

We'll tell you more about the music... first you have to name the Swedish town that claims IT has the biggest sundial in the world.

The answer is here...