From the Chupacabra to the Yeti, lots of countries and regions around the world have their own myths about strange creatures whose existence has never been scientifically proven - known as cryptids.
These 'eyewitness sightings' have captured people’s imaginations for decades and even centuries. Alex from the What in the World team takes Hannah on a tour of some of them - with help from BBC reporters Beverly Ochieng, Surbhi Kaul, Fan Wang, Blaire Toedte and Anselm Gibbs.
Email: whatintheworld@bbc.co.uk WhatsApp: +44 0330 12 33 22 6 Presenter: Hannah Gelbart Producer: Alex Rhodes Editors: Verity Wilde and Simon Peeks