The Union Watersphere, also known as the Union Water Tower, is a water tower topped with a sphere-shaped water tank in Union, New Jersey, United States and characterized as the World's Tallest Water Sphere.Adjacent to U.S. Route 22, New Jersey Route 82, and the Garden State Parkway, the iconic tower has been a landmark since its construction. The tower was originally commissioned the Elizabethtown Water Company and is now owned by American Water.