With Abraham Lincoln's birthday a day away, we look at one of the most timeless memorials to the 16th president - or at least the undercroft that's been out of public view for a long time. Plus: back in 1865 a man in Maryland carved a pretty unusual Lincoln memorial of his own into a beech tree.
Lincoln Memorial Undercroft (Atlas Obscura)
The Presidents' Tree (Friends of Sligo Creek)
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