D.C. Historic Sites 

While watching for broken infoboxes (I've rigged the bright orange "new messages" banner to display when there is one), the United States Botanic Garden came up. It doesn't appear to be on the NRHP and I was going to replace the infobox with an "Historic sites" one, but it does have a local D.C. designation. I don't know if you wanted to set up the new designation, or not. I did find an inventory list to go with it, however.. ​​​​​​​​ ​​Don't give up the ship