Lincoln Memorial's hidden 15,000-square-foot undercroft opens to the public after a century underground

National Parks Lincoln Memorial's hidden 15,000-square-foot undercroft opens to the public after a century underground The cavernous space beneath the iconic monument features interactive exhibits and original copy of the 13th Amendment By Alexandra Koch Fox News Published June 24, 2026 7:55pm EDT Facebook Twitter Threads Flipboard Comments Print Email Add Fox News on Google close Video Lincoln Memorial Undercroft museum to make historic opening in Washington, DC The Lincoln Memorial Undercroft museum will open to the public on Thursday, unveiling a space hidden beneath one of America's most iconic landmarks since 1922.

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