In Arizona, lightning strikes from so high above the ground, through such clear air, that it creates the perfect conditions for the most electrifying show on Earth.

Nazaré in Portugal is the site of the biggest ocean waves ever recorded on Earth. To show how monster waves are made, cameras plunge beneath the waves to reveal the sprawling landscapes of the seabed, and witness the Sardine Run in South Africa.

Volcan del Fuego in Guatemala is one of the world's most explosive volcanoes. To reveal what's happening within the volcano, cameras explore the `new' island of Surtsey, flamingos flocking in Kenya, and a boiling geyser in Iceland.

In the Arctic wilderness of Northern Sweden, cameras witness a stunning display stretching across thousands of kilometres in the night sky: the Aurora Borealis.