Hunt for the nation's oldest monuments, and prepare to get muddy
![D.C.](https://npr.brightspotcdn.com/dims3/default/strip/false/crop/2500x1667+0+0/resize/2500x1667!/?url=http%3A%2F%2Fnpr-brightspot.s3.amazonaws.com%2F7c%2F71%2Fb89729e54f90ba650b80270ee66b%2F20240428-dc-boundary-stones-fenston-01-1.jpg)
A series of small sandstone monuments marked the boundaries of the nation's capital in the 1700s. Most are still there, but they don't get a lot of visitors.
(Image credit: Jacob Fenston)
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