Lincoln Memorial’s hidden 15,000-square-foot undercroft opens to the public after a century underground – New York Post by Marsha42 | Jun 25, 2026 | Lincoln History | 0 commentsLincoln Memorial’s hidden 15,000-square-foot undercroft opens to the public after a century underground New York PostsourceSubmit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment *Name * Email * Website Save my name, email, and website in this browser for the next time I comment.