I can't say that we actually stopped, but we did drive past the northwest corner of Texas on US-64/US-56/US-412. The TX/OK/NM Tri-State monument is less than 1 mile to the east on a gravel road. Knock out two bucket list items in 5 minutes if you happen to drive by
https://maps.app.goo.gl/2UYWa98hxFxnmyBE9
Informational websites:
https://texasbob.com/texashistory/ths_nwcornertx.html
https://www.markjamesmullins.com/nwtxcorner.html
https://en.wikipedia.org/wiki/Texhomex

https://maps.app.goo.gl/2UYWa98hxFxnmyBE9
Informational websites:
https://texasbob.com/texashistory/ths_nwcornertx.html
https://www.markjamesmullins.com/nwtxcorner.html
https://en.wikipedia.org/wiki/Texhomex