TreeAlive maps family trees. When a visitor's ancestors lived in New Jersey, the markers standing near those places surface automatically alongside their family's journey:
Mount Airy · near where a family lived in the 1770s · a village grown up around Holcombe's storehouse, built 1743; the patriot army passed here in June 1778
When a marker stands near a place in your own tree, you have a personal reason to go see it. Open the live demo tree, choose the Crossings tab, and turn on Historical Markers to see the experience working (the demo family’s markers are in Pennsylvania; a New Jersey family sees New Jersey’s).
Scan: Washington's Headquarters marker