GPS Directions can be tricky on map apps.
From I-45: Exit onto 517 and head West (Right if you're driving south from Houston. Left if you're driving north from Galveston). Turn left on CEMETERY RD and then right on HWY 6
From Hwy 6: Turn left or right onto TOWER RD off of HWY 6 (depending on which direction you are coming from), you will see a Shell and Chevron, turn between the two. Then left on PINE ST, right on JACK BEAVER RD and then left on COWAN RD. You will see a barn home and red barn (Barns & Buildings location) on the gravel road, turn left and continue to the back of the property. There are signs along the route that take you to the parking area.
*Waze will take you the wrong way