This GZ is out in the open near two major highway intersections, so proceed with caution; for vehicles and muggles alike. Luckily there is plenty of parking at the Texas Travel Information Center. To help you out, this should be a fairly simple Park and Grab, just make sure to dig deep.
For more information about the Geo-Quest visit the Harlingen Parks and Recreation website by going to www.myharlingen.us and clicking on the Parks and Recreation Tab.