Groupon Today: $4 IMAX Tickets at the Smithsonian

Today's Groupon deal is $4 IMAX tickets at the Smithsonian Museum theaters! Below is a list of the theaters and films you can use the deal at:

Samuel C. Johnson IMAX Theater, National Museum of Natural History

• Tornado Alley
• Grand Canyon Adventure 3D: River at Risk (closes January 19, 2012) - I've seen this one and it's a great film and the soundtrack was done by Dave Matthews Band.
• Coral Reef Adventure (opens January 20, 2012)

Lockheed Martin IMAX Theater, National Air and Space Museum

• Legends of Flight
• To Fly!

Airbus IMAX Theater, Steven F. Udvar-Hazy Center

• Legends of Flight
• Fighter Pilot

Get the deal here.