MOONBOWS

They’re like rainbows, except they’re caused by moonlight rather than sunlight refracting through water particles in the air. Moonbows (sometimes called lunar rainbows) are fainter than their daytime equivalent, which means they appear to the human eye as white, not coloured, bows in the sky. For the best chances of seeing them, you need a full moon that’s low in the sky, and – in the opposite direction – rainfall, mist or water spray.

It’s water spray, and a great deal of it, that causes moonbows every full moon over Victoria Falls, on the border between Zimbabwe and Zambia. The best time to witness the spectacle is between April and July when the Zambezi River is at its highest.