Below you may find the Its country's biggest engineering project the 17-mile Guadarrama Tunnel is on the Valladolid-Segovia-this capital rail line which is part of the Jeopardy Archive. In case the question or answer is wrong or something is missing do not hesitate to contact us and we will be glad to help you out. This question was last seen on May 13 2021 Jeopardy! TV Game Show.

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