Travel on Harlan Lane for exactly 2 miles. Turn left onto Tapley Road. Observatory is on right side of road. Look for a stone wall with an iron wagon wheel gate. The observatory driveway is about 100 feet before that stone wall on the right.
Observatory has four buildings.
Two of the buildings are white cinder block, the third building is a dome, and the fourth a large white wooden building. Exit interstate at exit 98 which is highway 11. Turn right at end of exit ramp and head south. Drive to the town of Mansfield. Once you cross the railroad tracks proceed south on highway 11 for another 3 miles.