Counties you have been to that no other Atlasian has

[Jake]

Sullivan County, PA is the only one I could think of. World's End State Park is literally the only reason someone not from the area would go there as there's no highway passing through or any shortcuts.

[Jake]

Anyone here for Essex, NY or Addison, VT?  I think Addison, VT is much less likely given the lack of VT and upstate NY posters and small size

I've driven through Addison, VT.

And I've been to Bradford, PA.

[Jake]

I looked on a map, and you might if you were taking highway 220 from Central PA to Sayre or Elmira, NY. Or any of the major cities in upstate NY.

US-220 to Sayre is the only reason I'd drive the road from Central PA. Syracuse is better reached using I-80 to I-81 and Rochester is better reached by I-80 to I-180 to US-15 to I-86 to I-390. Binghamton is similarly better reached using I-80 to I-81. Elmira is also quicker reached using the I-180 to US-15 route.

[Jake]

Sussex, DE
Wicomio and Worcester, MD
Accomack and Northampton, VA

I've been to these