-- From HOUSTON, or points North -- Take Interstate 45 to Galveston, take the first exit (1C Harborside Drive), and follow Harborside to 20th street.  Turn right, and head south. The road will Dead End at a gigantic parking lot, and you can't miss the GREEN PEACE SIGN.

-- From BOLIVAR PENINSULA -- Take highway 87 to the ferry, ride the ferry.   At the second traffic light (The Strand), take a right, and this will turn into Harborside Drive.  Follow Harborside to 20th street.  Turn left, and head south. The road will Dead End at a gigantic parking lot, and you can't miss the GREEN PEACE SIGN. 

-- From WEST BEACH -- Take Highway 3005 (San Luis Pass Road) to the Seawall Blvd.  Continue down the seawall to 19th street, and turn left.  Proceed north on 19th street to Avenue D (a.k.a. Market Street).  Turn left and look to the left on 20Th street.  You can't turn left (into the Galveston Transit Bus and Trolly Terminal, but right past it you will see the entrance to a gigantic parking lot, and you can't miss the GREEN PEACE SIGN.