A pretty lake in Khao Lak, Thailand

A pretty lake in Khao Lak, Thailand in September 2017

Approaching one of the Similan Islands, Thailand

Approaching one of the Similan Islands, Thailand in May 2016

Vegetation off Khao Lak, Thailand

Vegetation off Khao Lak, Thailand in May 2016

The scenic railway track at the Blue Mountains, NSW, Australia

The scenic railway track at the Blue Mountains, NSW, Australia in September 2017

Ferns at the Blue Mountains, NSW, Australia

Ferns at the Blue Mountains, NSW, Australia in September 2017

Rainforest and ferns at the Blue Mountains, NSW, Australia

Rainforest and ferns at the Blue Mountains, NSW, Australia in September 2017

Walking on a rainforest canopy walk at Thung Khai Botanic Gardens, Trang, Thailand

Walking on a rainforest canopy walk  at Thung Khai Botanic Gardens, Trang, Thailand in May 2016

A vine on a rainforest tree at Thung Khai Botanic Gardens, Trang, Thailand

A vine on a rainforest tree at Thung Khai Botanic Gardens, Trang, Thailand in May 2016

Rainforest trees at Thung Khai Botanic Gardens, Trang, Thailand

Rainforest trees at Thung Khai Botanic Gardens, Trang, Thailand in May 2016

A tall rainforest tree at Thung Khai Botanic Gardens, Trang, Thailand

A tall rainforest tree at Thung Khai Botanic Gardens, Trang, Thailand in May 2016

Giant trees at the Tonpariwat Wildlife Sanctuary in Phang Na, Thailand

Giant trees at the Tonpariwat Wildlife Sanctuary in Phang Na, Thailand in May 2016

A giant rain-forest tree at the Sa Nang Manora waterfall in Phang Na, Thailand

A giant rain-forest tree at the Sa Nang Manora waterfall in Phang Na, Thailand in May 2016

Vegetation on the Shakadang Trail at the Toroko national park, Taiwan

Vegetation on the Shakadang Trail at the Toroko national park, Taiwan in August 2010

Gorge and mountains at the Shakadang Trail at the Toroko national park, Taiwan

Gorge and mountains at the  Shakadang Trail at the Toroko national park, Taiwan in August 2010

Stop global warming by saving our forests sticker at Khuan Kaeng Hot Springs Forest Park in Trang Province, Thailand

Stop global warming by saving our forests sticker at Khuan Kaeng Hot Springs Forest Park in Trang Province, Thailand in May 2016

The forest at the Ton Tae Waterfall in Trang Province, Thailand

The forest at the Ton Tae Waterfall in Trang Province, Thailand in May 2016

Lush tropical forest at Penang Hill, Penang, Malaysia

Lush tropical forest at Penang Hill, Penang, Malaysia in September 2012

A kampong in Kuching, Sarawak, Malaysia

A kampong in Kuching, Sarawak, Malaysia in January 2012

Bridge of 100 Lions over the Shakadang River in the Taroko Gorge, Taiwan

Bridge of 100 Lions over the Shakadang River in the Taroko Gorge, Taiwan in August 2010

Taroko Gorge, Taiwan

Taroko Gorge, Taiwan in August 2010