Konstantin Mikhailov / Western red cedar tree (Thuja plicata) trunks with moss and fungi, inland temperate rainforest of Olympic National Park, Washington, USA, Western North America, January.

Matthew Maran / Detail of frost on Western Red Cedar (Thuja plicata). Vancouver Island, Canada, March.

Oriol Alamany / Canadian Bunchberry (Cornus canadensis) flowering nest to Western Red cedar (Thuja plicata) tree trunk in Tofino old growth forest, Vancouver Island, British Columbia, Canada

Matthew Maran / Photographer Matthew Maran in the hollow core of a Western Red Cedar (Thuja plicata). The West Coast Trail, Pacific Rim national Park, Vancouver Island, Canada, September.

Matthew Maran / Hiker pausing on a forest trail by the trunk of an enormous Western Red Cedar (Thuja plicata). Pacific Rim National Park Reserve, Vancouver Island, Canada, October.

Tim Laman / Temperate rainforest with giant Western Red Cedar trees (Thuja plicata) Olympic National Park, Washington, USA.

Alan Watson / Trunks of Western hemlock trees (Tsuga heterophylla) and Western red cedar trees (Thuja plicata), in temperate rainforest, Upper Incomappleux Valley, British Columbia, Canada. July 2007

Alan Watson / Moss on the branches of Western hemlock tree (Tsuga heterophylla) with the trunk of Western red cedar tree (Thuja plicata) behind, in temperate rainforest, Upper Incomappleux Valley, British Columbia,...

Alan Watson / Trunk of a Western red cedar tree (Thuja plicata) and Western hemlock trees (Tsuga heterophylla) in temperate rainforest, Upper Incomappleux Valley, British Columbia, Canada. The upper Incomappleux...

Alan Watson / Trunks of massive Western red cedar trees (Thuja plicata) in temperate rainforest, Upper Incomappleux Valley, British Columbia, Canada. The upper Incomappleux valley contains the largest surviving r...

Alan Watson / Lichen growing on the bark of Western red cedar tree (Thuja plicata) in temperate rainforest, Upper Incomappleux Valley, British Columbia, Canada.

Alan Watson / Bark detail of Western red cedar tree (Thuja plicata) in temperate rainforest, Upper Incomappleux Valley, British Columbia, Canada.

Alan Watson / Trunks of Western red cedar trees (Thuja plicata) and Western hemlock trees (Tsuga heterophylla) in inland temperate rainforest, Goat Range Provincial Park, British Columbia, Canada. July 2007

Alan Watson / Trunk of Western red cedar tree (Thuja plicata) in inland temperate rainforest, Goat Range Provincial Park, British Columbia, Canada. July 2007

Alan Watson / Devil's club (Oplopanax horridus) leaves and fruit with Western red cedar trees (Thuja plicata) in the background, inland temperate rainforest, Goat Range Provincial Park, British Columbia, Canada.

Alan Watson / Devil's club (Oplopanax horridus) leaves and fruit with Western red cedar trees (Thuja plicata) in the background, inland temperate rainforest, Goat Range Provincial Park, British Columbia, Canada.

Matthew Maran / Shore pines (Pinus contorta) Western red cedar (Thuja plicata) and Western hemlock (Tsuga heterophylla) trees growing in coastal forest, Barkley Sound, Vancouver Island, Canada

Konrad Wothe / Western Red Cedar (Thuja plicata) tree, largest specimen in the world at 178 feet tall, Olympic National Park, Washington

Konrad Wothe / Western Red Cedar (Thuja plicata) tree, largest specimen in the world at 178 feet tall, Olympic National Park, Washington

Konrad Wothe / Western Red Cedar (Thuja plicata) tree, largest specimen in the world at 178 feet tall, Olympic National Park, Washington

Tim Fitzharris / Western Red Cedar (Thuja plicata) forest interior, Grove of the Patriarchs, Mount Rainier National Park, Washington

Tim Fitzharris / Western Red Cedar (Thuja plicata) trees, Oliphant Lake, British Columbia, Canada

Matthew Maran / Western Red Cedar {Thuja plicata} Bare trunks of trees can stand dead for hundreds of years as they have a high resistance to rot. The Big Tree Trail, Meares Island, Clayoquot Sound, Vancouver Island,...

Matthew Maran / Looking up the trunk of a Western Red Cedar {Thuja plicata} that has had its bark stripped by first Nation Americans for many uses such as mats, rope and clothing, The Big Tree Trail, Meares Island, C...

Matthew Maran / Person standing beside the trunk of a Western Red Cedar {Thuja plicata} The Big Tree Trail, Meares Island, Clayoquot Sound, Vancouver Island, BC, Canada

Matthew Maran / Looking up inside the trunk of a Western Red Cedar {Thuja plicata} These trees die from the inside out leaving huge hollows big enough for a person to walk in. The Big Tree Trail, Meares Island, Clayo...

Matthew Maran / Trunk of Western 'Grandma' Red Cedar tree {Thuja plicata} over 800 years old, The Big Tree Trail, Meares Island, Clayoquot Sound, Vancouver Island, BC, Canada

Eric Baccega / Roots of a giant Western Red cedar (Thuja plicata), old growth forest, MacMillan Provincial Park, Cathedral Grove, Vancouver Island, British Columbia, Canada

Matthew Maran / Mist over temperate rainforest with Western red cedar (Thuja plicata) and Western Hemlock (Tsuga mertensiana) trees in Warn Bay. Vancouver Island, Canada

Matthew Maran / Western red cedar (Thuja plicata) tree in Warn Bay. These trees can stand dead for hundreds of years thanks to their high resistance to rot. Clayoquot Sound, Vancouver Island, Canada

Tim Fitzharris / Western Red Cedar (Thuja plicata) old growth forest, Grove of the Patriarchs, Mount Rainier National Park, Washington

Philippe Clement / Old Man's Beard {Usnea longissima} hanging from the branches of Western red cedar {Thuja plicata}, Glacier NP, Montana, USA

Philippe Clement / Close up of bark of Western red cedar {Thuja plicata} Belgium

Tim Fitzharris / Western Red Cedar (Thuja plicata) grove of the patriarchs, Mt Rainier National Park, Washington