Curiosity

The last remaining boundary marker for the Republic of Texas https://t.co/tSGp1tlMH0 pic.twitter.com/7E1nrBc6Zt

— Atlas Obscura (@atlasobscura) November 4, 2016

Interesting to me only because I know that DC's collection of boundary stones is much more complete. Now if I could find out what those markers in the median of I70 near the border of Maryland and Pennsylvania are.