Is this real life or a plot for a new adventure movie? The 75-year-old Mount Rushmore is easily recognizable throughout the world, but until recently, few people knew about the massive room hidden deep inside the iconic stone image of the four famous American presidents.

The secret chamber in the hills of South Dakota was included in the original plans of Mount Rushmore, according to a report from the Huffington Post. It’s actually meant to be a “Hall of Records”, a museum behind the images that was abandoned and now sits as an empty cavern.

The Hall of Records was envisioned by Danish-American designer Gutzon Borglum to extend 80 by 100 feet with a grand 800-foot staircase leading to it.

The room was meant to house important, historically significant documents such as the Declaration of Independence and the Constitution, a report from History revealed. Instead, anyone who stumbles upon this remarkable secret would face an empty room. All that remains are leftovers from its construction: holes for dynamite blasting and red numbers painted by the designer as instructions.

Borglum wanted the chamber-slash-museum to be able to explain the meaning of Mount Rushmore – for future generations, civilizations, and maybe even interplanetary visitors…. read more here