Pin a city, or several, and pick what you want to see, the same way as on the leaderboards. Every
National Register listing that matches goes on the map in driving order, with a route you can open in Google Maps
and a link you can send.
Driving somewhere anyway? Paste the directions link from the app you plan in, pick what you
like, and get the National Register places worth stopping for along the way, with the minutes each one adds. Then
send the trip back to Google Maps or Apple Maps with the stops added.
Pin a city to begin. The stops come from the National Register; a listing without a
public coordinate is left off the map and said so.
Paste a link to begin. A link without a start (Waze, or a single place) asks
where you're starting from; one we can't read gives you Start and End boxes instead.