Kirkendall-Spring / Lower Yellowstone Falls on the Yellowstone River viewed from Artist Point, Yellowstone National Park, Wyoming, USA, June 2013.

Kirkendall-Spring / Lower Yellowstone Falls with rainbow, on the Yellowstone River viewed from Lookout Point Trail, Yellowstone National Park, Wyoming, USA, June 2013.

Nature Production / Aerial view of rice paddy fields (Oryza sativa) fixed-point observation of seasonal changes, ploughed fields in early winter, Shiga, Japan, November, sequence 7/8

Nature Production / Aerial view of rice paddy fields (Oryza sativa) fixed-point observation of seasonal changes, summer, Shiga, Japan, early August, sequence 4/8

Sven Zacek / Hiking trail with boardwalk and viewing platform over frozen bog pools, aerial view. Endla Nature Reserve, Jogevamaa, Central Estonia. December 2016.

Enrique Lopez-Tapia / Observation tower in the rainforest, Rio Platano Biosphere Reserve and UNESCO World Heritage Site, La Mosquitia, Honduras.

Tony Wu / Dinah's gobies (Lubricogobius dinah) pair in their beer-bottle home, found at a depth of 30 metres at Observation Point in Milne Bay Province, Papua New Guinea

Tony Wu / Dinah's gobies (Lubricogobius dinah) pair in their beer-bottle home, found at a depth of 30 metres at Observation Point in Milne Bay Province, Papua New Guinea

Tony Wu / Dinah's gobies (Lubricogobius dinah) pair in their beer-bottle home, found at a depth of 30 metres at Observation Point in Milne Bay Province, Papua New Guinea

Tony Wu / Dinah's gobies (Lubricogobius dinah) pair in their beer-bottle home, found at a depth of 30 metres at Observation Point in Milne Bay Province, Papua New Guinea

Kirkendall-Spring / Lookout point on top of Mount Pilchuck, Mount Pilchuck State Park, Cascade Mountains, Washington, USA, July 2014. Model released.

Kirkendall-Spring / Lookout point on top of Mount Pilchuck, Mount Pilchuck State Park, Cascade Mountains, Washington, USA, July 2014. Model released.