Awww of the day
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.
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.
Daredevil kayakers stand looking straight down a 350ft drop from Victoria Falls - the largest waterfall in the world.
Standing on one of the islands that appear during the dry season, they were able to look over the edge of the massive torrent of water, which flows between the African nations of Zambia and Zimbabwe.
One slip would have seen the trio plummet to their deaths - and if that wasn't enough to worry about, crocodiles lurked metres away