For more than 100 years, millions of people have visited the iconic Lincoln Memorial without realizing there was a hidden world directly beneath their feet.
That underground space — known as the Lincoln Memorial undercroft — is finally set to open to the public for the first time as part of a major new museum experience in Washington, D.C.
The long-awaited attraction is scheduled to debut in June, giving visitors an unprecedented look beneath one of America’s most famous monuments ahead of the nation’s 250th anniversary celebrations.
The new immersive museum will feature historic exhibits, multimedia presentations, architectural views into the memorial’s foundations, and stories about how the Lincoln Memorial became one of the nation’s most important sites for protests, speeches, and civil rights history.
What is the Lincoln Memorial undercroft?
The undercroft is the enormous cavernous area hidden beneath the Lincoln Memorial’s main chamber.
Originally built between 1914 and 1922 as part of the memorial’s structural foundation, the underground space contains towering concrete columns and massive open corridors designed to support the monument above.
For decades, the area remained largely inaccessible to the public and became one of Washington’s most fascinating hidden spaces.
Now, the National Park Service and National Park Foundation are transforming roughly 15,000 square feet of the undercroft into a modern museum experience.
Visitors will be able to see floor-to-ceiling glass views into the historic foundation area while learning about the memorial’s construction, symbolism, and cultural significance.
The museum will also highlight pivotal moments in American history connected to the Lincoln Memorial, including Marian Anderson’s historic 1939 concert and Dr. Martin Luther King Jr.’s “I Have a Dream” speech during the 1963 March on Washington.
Highlights expected inside the museum include:
- Immersive multimedia exhibits
- Historic projections displayed onto the undercroft walls and columns
- New educational galleries about Abraham Lincoln and the memorial’s history
- Expanded visitor amenities and updated accessibility features
- Rare behind-the-scenes views beneath the monument
When does the Lincoln Memorial undercroft open?
The Lincoln Memorial undercroft museum is scheduled to officially open on June 25, 2026.
The debut comes as Washington prepares for major America 250 celebrations tied to the 250th anniversary of the Declaration of Independence in 2026.
Officials have described the project as one of the most significant upgrades to the National Mall visitor experience in decades.
Construction on the nearly $69 million project began in 2023 and has remained underway while the memorial itself stayed open to visitors.
How will visiting the undercroft work?
Visitors will access the new museum experience directly beneath the Lincoln Memorial through a redesigned lower-level visitor area.
According to project plans, the undercroft museum will include new exhibit halls, immersive theater elements, upgraded elevators, expanded restrooms, and improved accessibility features intended to modernize the overall visitor experience.
The Lincoln Memorial itself will continue operating as one of the National Mall’s free public attractions, meaning visitors will be able to explore the undercroft museum as part of a standard visit to the memorial!
Officials have also emphasized that much of the underground space’s raw architectural appearance will remain intact, preserving the dramatic “cathedral-like” atmosphere created by the massive concrete support columns beneath the monument.
