California’s Coast Redwood (Sequoia sempervirens) trees are the tallest living things on Earth and are also among the oldest.

But they are far from invulnerable and some fear that climate change may endanger the future of the species.

The BBC Travel Show’s Mike Corey visited Big Sur in California earlier in 2019 and his film was featured in a special end-of-year edition of the programme.

The Travel Show can be seen on BBC World News and the BBC News Channel.