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A ‘forest full of secrets’ is the focus of this second incredible visit to Mexico.

Covering 50,000 square miles, the forests of the Yucatán peninsula were once home to the ancient Maya civilisation.

Huge natural wells known as cenotes are everywhere, sustaining the insects, animals and people living here.

Brightly coloured birds, shouting howler monkeys and neon Caribbean flamingos are just some of the residents of the Yucatán – and we meet them all in this beautifully filmed programme.

Don’t miss the making-of Mexico Diaries immediately afterwards.