Enter street,city,state or zip code or lat,-lon (dd.ddd)
(for other lat/lon encodings or UTM or NAD27 use this)
Distance buttons:
left click on map to make a track
this button will popup a window from which you can save the track as a
file.gpx for uploading to your GPS.
The map shows the deepest hole (sinkhole, basin, crater)
for each state based on
Andy Martin's list, with
more
detail.
See map of highest point in each state.