These are cell phone towers disguised as large trees. You can find these faux trees across NJ, mostly along major highways such as the GSP, Route 78 and Route 287. The one mentijoned in WNJ is on the GSP. The one shown here is on Route 17S in Ramsey. A new one just went up on Route 4 in Teaneck according to this amusing article by Mike Kelly
The Lostinjersey Blog 
Posted by billy bob on August 25, 2009 at 4:33 PM
It’s in Allendale!