Parking our bikes in front of the Penguin Beach, our guide introduced us to two Humboldt penguin chicks in the penguin nursery, where they were still learning to swim in the shallow pool. We watched the feeding from the side of the main pool (the largest penguin pool in the UK), and as soon as the frozen block of fish hit the water, the fully-grown penguins stopped preening their feathers to dive after the food, outstripping stray herons by their incredible dive speeds.