This stunning Vortex Fountain designed by William Pye is located in Seaham Hall, Sunderland (United Kingdom). Its a large acrylic polymer cylinder which allows an air-core vortex to form as water is pumped in a circular motion. Amazing design! 

The vortex fountain works by pumping water in a circular motion up a large acrylic cylinder, and forces water to cascade down its sides. This has the effect of creating a vortex in the middle of the fountain, and since the cylinder is completely transparent, the water appears to stand still, like a solid block of water.