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What’s Inside the Secret Chamber at Mount Rushmore?

By Daily Passport Team
Read time: 4 minutes

There are few American landmarks more instantly recognizable than Mount Rushmore. The majestic visages of Presidents George Washington, Thomas Jefferson, Theodore Roosevelt, and Abraham Lincoln draw over 2 million visitors every year to the Black Hills of South Dakota. While many of them simply admire the stunning monument from afar, what many don’t realize is that there’s a hidden, inaccessible room built into the rocks behind President Lincoln’s head. Find out why it exists and what’s inside the secret chamber at Mount Rushmore. 

Building the Monument

View of the giant carved presidential faces of Mount Rushmore in the Black Hills of South Dakota
Photo credit: Frennet Studio/ Shutterstock

In 1927, construction began in the Black Hills National Forest to sculpt the faces of four U.S. Presidents into the side of a mountain. Sculptor Gutzon Borglum led the project with 400 workers under his management. After 14 years, almost $1 million (equivalent to $15 million today), and the removal of 450,000 tons of rock, Mount Rushmore was finally completed and opened to the public in 1941.

When the project first began, Borglum had even bigger plans for the sculpture — and technically, Mount Rushmore isn’t even halfway complete according to the sculptor’s vision. In Borglum’s original plan, he wanted to depict the four presidents from the waist up. He mocked up a 1/12-scale model of the completed monument, which can still be seen on display in his studio.

The Hall of Records

Close-up image of one of the giant presidential faces of Mount Rushmore
Photo credit: Frennet Studio/ Shutterstock

In addition to depicting the Presidents from the waist up, Borglum had another grand idea for the monument. He wanted to construct a Hall of Records to house the most important documents and artifacts in American history. The proposed room measured 80 by 100 feet and was supposed to be drilled into the mountain behind the presidential heads. To get to the hall, Borglum wanted an 800-foot granite staircase reaching the top of the mountain.

Bronze and glass cabinets would be placed in alcoves all around the room to house important artifacts such as the Declaration of Independence and the Constitution. There would also be busts of several famous Americans and a list of American contributions to science, arts, and industry. At the grand entrance to the hall there was to be a massive bronze eagle with a 38-foot wingspan. Clearly, Borglum was prepared to spare no expense to make Mount Rushmore the grandest monument in America.

Construction Stops

Roadway curving past Mount Rushmore in South Dakota
Photo credit: Jess Kraft/ Shutterstock

In 1941, two major events happened: Gutzon Borglum died and the United States entered World War II. Initially, Borglum’s son, Lincoln, took over the management of the project, but once the U.S. officially entered the war in December of 1941, all construction ceased since the money used to build the monument was used towards the war effort.

Luckily, the faces of the presidents had been completed, so the monument didn’t look unfinished. The Hall of Records, however, wasn’t so lucky. The team had blasted a 70-foot tunnel into the rock behind Lincoln’s head and began to carve away some of the walls before construction stopped. The tunnel was left unfinished with jagged walls that ended in an anticlimactic point.

Work Begins Again

Monument displaying names of construction works of Mount Rushmore
Photo credit: Jason O. Watson/ Alamy Stock Photo

Decades after construction stopped, a team returned to Mount Rushmore in 1998 to put the finishing touches on the Hall of Records. Sixteen porcelain enamel panels were inscribed with the words of the Declaration of Independence, a biography of Gutzon Borglum along with each of the presidents depicted, and a history of the memorial’s construction and the United States. The panels were placed in a box, sealed in a titanium vault, and lowered into the ground inside the unfinished Hall of Records. A 1,200-pound piece of black granite was placed over the hole with a quotation from Borglum written on it:

“… let us place there, carved high, as close to heaven as we can, the words of our leaders, their faces, to show posterity what manner of men they were. Then breathe a prayer that these records will endure until the wind and the rain alone shall wear them away.”

Although the Hall of Records was never completed in the grand way that it was envisioned, it has become a shrine dedicated to Borglum and his passion for his country. Unfortunately, it’s impossible for tourists to reach the secret room due to the difficulty of climbing the mountain. Perhaps that will ensure its survival for centuries to come.

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