The Lincoln Memorial's hidden ‘cathedral' now on display as Undercroft museum opens (opens original article in a new tab)

The Lincoln Memorial's Undercroft museum opened, revealing the monument's hidden foundations and engineering through exhibits. The $69 million project, largely funded by David Rubenstein, offers free admission with timed tickets.

• The Undercroft museum at the Lincoln Memorial opened to the public, showcasing the structure's hidden concrete foundations.
• The museum features 15,000-square-foot exhibits explaining the engineering and history of the memorial.
• David Rubenstein funded $50 million of the $69 million project to educate visitors about Abraham Lincoln beyond his statue.