Williams Waterwall is a multi-story sculptural fountain which sits at the south end of Williams Park in Houston's Galleria/Uptown district. It was built as an architectural complement to Williams Tower (originally Transco Tower) at the north end of the park. Both the fountain and tower were designed by architect Philip Johnson, with consruction of the complex completed in 1985.

The semicircular fountain is several stories high and reaches above surrounding trees. The concave portion of the circle--which faces north toward the 51-story tower--is fronted by a proscenium arch which is shorter than the actual fountain. The convex portion of the fountain, its backside, faces south onto Hidalgo Street.

Water cascades in vast channelled sheets from the narrower top rim of the circle to the wider base below, both on the convex side and on the rear side. This creates a visually striking urban waterfall that can be viewed from various buildings around the district.

Known simply as "The Waterwall" to Houstonians, the fountain is a popular backdrop for shutterbugs. Wedding photographers in particular have a fondness for the site.