Angle Inlet has the distinction of being the northern most town in the contiguous United States. This slice of land is part of Minnesota, because treaties between the US and Great Britain in the 17th and 18th century defined America's northern border as the Northwestern most point of Lake of the Woods, before accurate maps of the area existed. Today, the Angle consists of about 100 residents, a post office, the last one-room school in Minnesota, as several Fishing Resorts.
If you go:
Gravel roads provide the only land access to Angle Inlet. Visitors must first cross into Canada, and drive about 60 miles through Manitoba. There is no customs station at the US Border, instead, visitors are required to use a video phone to check-in with the US Border Patrol upon arrival at Angle Inlet, and call again to check-in with Canadian authorities before departing.
Links:

Angle Inlet Historic Marker
17606 Inlet Road NW
Angle Inlet, Minnesota 56711 USA
info@lakeofthewoodsmn.com
Mailing address:
Lake of the Woods Tourism
P.O. Box 518
Baudette, MN 56623 USA
Phone Numbers:
Lake of the Woods Tourism
+1 (800) 382-3474
+1 (800) 382-3474
Message from RoadTrip America