From the Mass Pike

Westbound: Take the Mass Turnpike West to I-495 North. Take Exit 25B (I-290 West). Take Exit 22 and turn right off exit. At second traffic light, turn left onto Plantation Street. The entrance will be on your right.
Eastbound: Take Mass Turnpike East to Exit 10 (I-290 East). Take I-290 West to Exit 21. Turn right off exit onto Plantation Street. Go to second traffic light. The entrance will be on your right.

From Route 9

Take Route 9 West from points east of Worcester. Cross bridge over Lake Quinsigamond at the Shrewsbury/Worcester line. Go right at the second lights onto Plantation Street. Take a left after the third set of traffic lights and take first right into the parking area.

From I-290

Westbound: Take I-290 West to Exit 22 and turn right off exit. At second traffic light, turn left onto Plantation Street. Go to fourth traffic light. The entrance will be on your right.
Eastbound: Take I-290 East to Exit 21. Turn right off exit onto Plantation Street. Go to second traffic light. The entrance to will be on your right.