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The Argo Mill and Tunnel is the #1 Attraction in Idaho Springs

Experience Our Shared Heritage

Experience the wonder of ingenuity, technology, and entrepreneurial spirit that is the Argo Mill & Tunnel.

Situated in Historic Idaho Springs in the heart of Colorado Gold Country sits the Mighty Argo Mill and Tunnel, one of the most striking and prominent Heritage Landmarks in the American West. The Argo is a central character in the story of the Colorado gold-rush, and remains one of the largest, most well-preserved historic gold mills in the world.

Tripadvisor® recommends the Argo Mill and Tunnel Tour as the #1 thing to do in Idaho Springs for its history, authenticity, and hands-on experience.

  1. Discover a Treasure of the American West

    The monumental Argo Mill stands over 110’ tall and processed over $100 million of gold ore – 2.6 trillion in 2020 dollars. On your tour of the mill and tunnel, you will be immersed in the spirit that defined the Victorian Industrial Revolution.

  2. A National Historic Landmark

    The Argo Mill and Tunnel is listed on the National Register of Historic Places, and continues to be one of the region’s most recognizable landmarks.

  3. Catch Gold Fever

    This is a real affliction! Known remedies include panning for gold, learning about milling techniques, and being inspired by the remarkable guile of the prospectors that came before.


Your visit to the Argo Mill and Tunnel includes…

A brief orientation from your guide on the dramatic history of the site and region

  1. A brief orientation from your guide on the dramatic history of the site and region

#1 Visitor Attraction

The “Mighty Argo” attracts guests from every state and from across the solar system.