The Baton Rouge dome is among the most important because it was the world's first large industrial use of the geodesic concept.
From the outside, the design of the dome makes it seem smaller than it actually is. Its diameter is 384 feet, making it big enough to house a baseball field. It's 125 feet high, weighs 620 tons and is 110,000 square feet. Each of the 321 welded steel hexagons weighs roughly 2 tons.
Inside the dome is another dome, and the second one surrounds a control tower that is 80 feet high. The second dome, once covered with glass, served no purpose.
The building has changed hands and now is owned by KCS Rail.