Columns of marble that were once part of the Colorado-Yule Mining Company's thriving processing mill's foundation in the tiny town of Marble in Colorado's Crystal River Valley still stand at what is now a U.S. National Historic Site. The mill took giant hunks of marble quarried high above, cleaned and refined them for shipment to customers, including wealthy homeowners looking to add classical touches to their estates and government entities, seeking fine-quality marble for public buildings. (Marble from this operation was used to create the Lincoln Memorial in Washington, D.C., and the Tomb of the Unknown Soldier in Arlington, Virginia.) The marble veins slowly played out, and the company stopped and started production several times before closing in 1941. In recent years (as of 2015), however, a new and richer lode of marble was uncovered, and production under the ownership of an Italian marble company resumed. Next door to this site at the time of this photograph, trucks carrying multi-ton blocks of marble pulled into that company's operational headquarters. Photo by Carol Highsmith.