The site's own map, right here in the card. Drop two points — a town name, a coordinate pair, a Plus Code or a UK grid reference — and get the geodesic distance on the WGS84 ellipsoid, the initial bearing, the Plus Code of each end and the nearest town to each. Everything is computed on your device from data shipped with the page, so it works with the network switched off. The full map adds live OpenStreetMap streets, vehicle-aware driving routes with the signed speed limits along them, live traffic where a free feed exists, weather at the time you will be there, turn-by-turn guidance that keeps working with no signal, measuring, elevation and sun times.