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Zion NP, Utah
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When it opened in 1930, the Zion-Mount Carmel Tunnel was the longest non-urban road tunnel in the United States, stretching 1.1 miles through the sandstone cliffs of Zion National Park.
The tunnel features six large windows carved into the rock, providing breathtaking views of the canyon and allowing light to enter the tunnel.
The Zion-Mount Carmel Tunnel serves as a crucial link between Zion National Park and Bryce Canyon National Park, facilitating travel and tourism between these two iconic destinations.
Constructed during the Great Depression, the tunnel was a remarkable engineering achievement, requiring innovative techniques to carve through the solid rock of the canyon walls.
Due to its narrow width, the tunnel operates with a one-way traffic system for larger vehicles, requiring them to travel through the center of the tunnel.
The Zion-Mount Carmel Tunnel is a key feature of the Zion-Mount Carmel Highway, a scenic byway that offers stunning views and access to several hiking trails.