Shenandoah Tunnel Poster Nevada Named for its vibrant red

Named for its vibrant red cliffs by explorer John Wesley Powell

1941 to “turn factory wheels to make the lives of men more fruitful

When donations failed to fund the purchase of the defunct Tioga Road

The Mesa Top Loop Road was created to furnish efficient access to Mesa Verde’s key archeological sites and to provide visitors with amazing canyon views

Shenandoah Tunnel Poster Nevada Named for its vibrant redProduct Details 14" x 22" poster Interpretive Copy Construction on Marys Rock Tunnel began in 1931 and was considered a monumental feat of engineering. Workers used an average of 1000 pounds of dynamite daily for three months to blast through over 670 feet of solid granite. The novelty of the tunnel drew hundreds of thousands of visitors, and in 1937 Shenandoah National Park became the first national park to reach one million annual visitation.