The world beneath the waves is one of kaleidoscopic creatures gliding through the clear blue, curious fish darting between reefs, and blissful, beautiful silence. Whether you're floating gently with a snorkel or heading deeper with tanks strapped on, the oceans (and lakes!) of our planet have plenty of stories to tell. Think freshwater magic in Lake Malawi, technicolour reefs in Indonesia, or the volcanic underwater drama of the Galapagos. No experience necessary – just bring your sense of awe.