Northwest corner of Texas
In this photo, I was standing (as close as I could figure) on the northwest corner of Texas' panhandle.  There was a USGS benchmark in the grass on the shoulder behind me that indicated the actual point was a certain number of feet in this direction.  So I assumed the corner was right in the middle of US Highway 56-64-412 (turns out it's not though; see link below).  The north state line is the dirt road behind me (on which my car was parked):
Picture
Sanderson, fall 1991
Someone who may have never looked closely at a decent map of this area might be inclined to believe that my camera was in New Mexico, and that everything behind me and north (left) of the dirt road would be part of Oklahoma's panhandle.  Actually, that is all part of New Mexico.  New Mexico "wraps" around the Texas panhandle for a mile or two before it reaches Oklahoma.  The actual tri-state corner (common to New Mexico, Texas, and the southwest corner of Oklahoma's panhandle) is about two miles east (behind me) on the dirt road. 

This next photo was taken looking the opposite direction (heading west along the north line of the Texas panhandle):
Picture
Morrison, Apr. 2017
Visible on the horizon is Rabbit Ears Mountain, about ten miles distant.  The Texas boundary reaches the shoulder of this highway, and then makes a sharp turn to the left (south), forming the west edge of the Panhandle.  Everything to the right and ahead is in New Mexico.  This webpage explains exactly where the corner is, and how to locate the actual marker.  The closest town to this point is Texline; this photo was taken from there:
DSCN7614
Research and/or photo credits: Jeff Morrison; Dale Sanderson
Page originally created 1998;
last updated Jul. 31, 2021.