Hello Beto217,
Thanks for using the Apple Support Communities!
If your Find My app is showing the wrong location for your device, you'll first want to try restarting to see if that improves the accuracy of the location: Restart Apple Watch - Apple Support
Are both your Apple Watch and paired iPhone fully up to date? If not, or if you're not sure, these steps can help you check:
Update your Apple Watch - Apple Support
Update your iPhone or iPad - Apple Support
If this doesn't seem to improve things, please comment back with if you're still seeing the same location.
Cheers!