The very good people at Smithsonian magazine have enlisted the participation of museums across the United States to open their doors to visitors at no charge for one day — tomorrow.

To get your pass, go to the Web site that the Smithsonian has set up. After a quick registration, they'll present you with a pass you can print out and take with you. The pass will get you and one guest in the doors of any of the participating museums across the country for free. On the site, you can do a quick search to find museums in your area that are taking part in the program. 

Whether it's an institution that you've always meant to check out and never quite gotten the time, or whether it's a museum that's one of your favorite places to spend an afternoon, this is a great way to spur interest in museums in the U.S.