The Gerald D. Hines Waterwall Park, formerly the Williams Waterwall and the Transco Waterwall, is a multi-story sculptural fountain which sits opposite the south face of Williams Tower in the Uptown District of Houston. The fountain and its surrounding park were built as an architectural amenity to the adjacent tower. Both the fountain and tower were designed by John Burgee Architects with Philip Johnson. Originally privately owned in common with the office tower, the waterwall and the surrounding land were purchased by the Uptown Houston Tax Increment Reinvestment Zone, a non-profit local government corporation, in 2008 to ensure the long term preservation of the waterwall and park. The fountain currently operates between 10 am and 10 pm.