Watch films that come to life in the museum's 4D Theater, featuring air blasts, leg ticklers, vibrating seats and more.. 3. Features one of the largest digital dome planetariums in the Southeast.. Four museums in one – art, history, natural history science and technology. The museum's state-of-the-art Boeing Observatory is home to the historic 1926 Alvan Clark telescope. The Observatory is open for solar observing during the day, and is also open late on Tuesdays for night-sky viewing.. Cotton Mill Exchange – one of the largest and finest museum stores in the country with unique South Carolina gifts, food, and clothing items and more.. Finn, the museum's giant reproduction megalodon shark, delights guests young and old in the museum's 2nd floor natural history gallery.. The Crescent Café has wonderful food and drinks.. See the Clemson 372, probably the first college student-built airplane in the United States.. Fall Heritage Festival in October features artists, craftspeople making, selling and demonstrating unique four types of the state’s delicious barbecue.. Features one of the largest digital dome planetariums in the Southeast.. eatures one of the largest digital dome planetariums in the Southeast.