Beautiful and durable, mahogany has been highly prized and traded internationally for centuries. Reaching the impressive height of 60 metres or more they are true giants of the forest. Selective logging of mahogany was unchecked across much of its range until international agreements restricted its trade. But has this been enough? Monty Don finds out more about the big-leaf mahogany and whether we can continue to use its beautiful wood without forfeiting its future.