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The Y-12 Building 9731 is a point of interest located within the Oak Ridge National Laboratory in Tennessee. It is part of the Manhattan Project National Historical Park, which preserves and interprets the history of the Manhattan Project and its legacy.

Visitors to the Y-12 Building 9731 can take a tour and learn about the important role it played in the development of the atomic bomb during World War II. The building was used for uranium enrichment and was one of the largest buildings in the world at the time. The tour includes a visit to the building's control room, where visitors can see the original equipment used to monitor and control the enrichment process.

In addition to its historical significance, the Y-12 Building 9731 is also a unique example of mid-20th-century industrial architecture and engineering. Visitors can see the building's massive concrete walls, steel framing, and other features that were designed to withstand explosions and other hazards.

Overall, the Y-12 Building 9731 is a fascinating destination for anyone interested in history, science, engineering, and architecture. Its unique history and design make it a must-see attraction for visitors to the Oak Ridge National Laboratory and the Manhattan Project National Historical Park.