If you like Tetris you should try Statetris.

From the website:

Statetris is an interesting game mixing aspects of the popular game ‘Tetris’ and geography. Instead of positioning the typical Tetris blocks, you position states/countries at their proper location. Fun, challenging and educational!

You can currently choose from the following maps: Africa, Europe, France, Japan, Netherlands, South Carolina, UK and the United States.

Link via Kottke