Check the Waypoints for the nearest parking; located below the Tiger bridge. It is approx. a quarter mile walk to GZ. You are looking for a preform container. Don't disturb the stone feature.
The path can be very busy at times, especially on the weekends so stealth will be required.
Please re-hide the cache in a way that it isn't easily noticed and other cachers can enjoy the hunt. BYOP
Good Luck!