According to Greek mythology, the sirens Charybdis and Scylla resided in the Sicilian Sea. Homer tells us that because Charybdis had stolen the oxen of Hercules, Zeus struck her with a thunderbolt and changed her into a whirlpool whose vortex swallowed up ships.
1. In the fascinating vortex water sculpture by artist William Pye entitled Charybdis, the circular movement of water inside a transparent acrylic cylinder forms an air-core vortex in the centre. Steps wrap around the cylinder and allow spectators to view the vortex from above. The cylinder was manufactured in Grand Junction, Colorado.
3. This sculpture was completed in 2000 for the Seaham Hall Hotel in County Durham, UK. (Andrew Curtis)