The American Museum of Science and Energy in Oak Ridge, Tennessee is offering a week of free admission from March 17 – March 22.
From the website:
AMSE Spring Break Free Admission Days sponsored by Fluor-B&W Oak Ridge. Get free admission to AMSE and see 'Where Science and History Come Alive' as you experience, experiment and discover the World War II Manhattan Project history and the science that evolved through interactive exhibits, live demonstrations, audiovisuals and artifacts. Tour AMSE's original 1940's flat top house with period furnishings. Lift off with "Take Flight" and "Cold War Crisis: The U-2 Incident" traveling exhibitions, too. Lobby and Upper Level of AMSE.