Franco Banfi / Three False clownfish (Amphiprion ocellaris) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Sven Zacek,Sven Zacek / Kopu lighthouse - the oldest lighthouse in Estonia, on Hiiumaa island. August 2011.

Robert Thompson / Aerial view of the East Lighthouse, Rathlin Island, County Antrim, Northern Ireland, UK, September 2009

Robert Thompson / Aerial view of the East Lighthouse, Rathlin Island, County Antrim, Northern Ireland, UK, September 2009

Guy Edwardes / Flowering Fleabane (Erigeron glaucus) with Portland Bill Lighthouse in the distance, Isle of Portland, Dorset, England, June 2006

Peter Lewis / Waves crashing over the rocks at Portland Bill with lighthouse in the background, Dorset, UK

Steve Knell / Fishermen's ropes and Spurn point lighthouse, East Yorkshire, UK

Ernie Janes / Tantallon Castle, East Lothian, on the Firth of Forth, with Bass Rock and the Gannet (Morus bassanus) colony, in distance, UK, July 2018.

Ernie Janes / Bass Rock with flocks of gannets (Morus bassanus) viewed from farmland on the Firth of Forth, East Lothian Scotland. UK, July 2018.

Sven Zacek / Sorve Saar peninsula and lighthouse in evening light. Saaremaa Island, Saremaa, Western Estonia. July 2010.

Sven Zacek / Sorve Saar peninsula and lighthouse in evening light. Saaremaa Island, Saaremaa, Western Estonia. July 2017.

Sven Zacek / Hummock ice hills on shore of Lake Peipsi / Peipus, Nina Kula, Tartumaa, Eastern Estonia. April 2018.

Mark Carwardine / Humpback whale (Megaptera novaeangliae) - surfacing in front of East Quoddy Lighthouse, Head Harbor, Campobello Island Bay of Fundy, New Brunswick, Canada

Gavin Hellier / Aerial shot of Beachy Head cliffs and lighthouse, East Sussex, England, UK, September 2017. Hellier

Gavin Hellier / View of the chalk cliffs and lighthouse at Beachy Head at sunset, Eastbourne, East Sussex, England, UK, June 2017. Hellier

Franco Banfi / Two Ambonian / Squat shrimps (Thor amboinensis) on coral, Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Red sea whip coral (Ellisella sp) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Two Mushroom coral / Commensal shrimps (Cuapetes / Periclimenes kororensis) on Mushroom coral (Heliofungia actiniformis) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific O...

Franco Banfi / Commensal shrimp (Pliopontonia furtiva) camouflaged on Disc anemone (Amplexidiscus fenestrafer) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Commensal shrimp (Pliopontonia furtiva) camouflaged on Disc anemone (Amplexidiscus fenestrafer) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / Two Commensal shrimps (Periclimenes tosaensis) in Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Philippines, Pacific Ocean.

Franco Banfi / False clownfish (Amphiprion ocellaris) and a Commensal shrimp (Periclimenes / Ancylomenes tosaensis) in a Sea anemone (Heteractis magnifica) Lighthouse Reef, Cabilao Island, Bohol, Central Visayas, Ph...

Franco Banfi / Lighthouse, Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Lighthouse, Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Lighthouse in distance, Tubbataha Reef Natural Park, UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Lighthouse, Tubbataha Reef Natural Park UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Franco Banfi / Lighthouse, Tubbataha Reef Natural Park UNESCO World Heritage Site, Sulu Sea, Cagayancillo, Palawan, Philippines

Peter Lewis / Rough seas off the coast of Newhaven East with lighthouse, Sussex, England, UK, May 2015.

Aflo / Horse foals in field in front of lighthouse, Aomori, Hokkaido, Japan, June.

Sven Zacek / Suurupi wooden lighthouse, surrounded by autumnal birch trees (Betula) Harjumaa county, Estonia, October 2013.

Philip Stephen / Sunrise at Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Sunrise at Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Sunrise at Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Surf breaking onto beach at sunrise, near Rattray Head, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Sunrise at Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / View over dunes of Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Heavy seas crashing against the coast at Buchan Ness Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Heavy seas crashing against the coast at Buchan Ness Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Heavy seas crashing against the coast at Buchan Ness Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Heavy seas battering the coastline of north-east Scotland during a winter storm, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Waves breaking as they reach the shore, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Sunny day at Buchan Ness Lighthouse. north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / View of Rattray Head Lighthouse across sand dunes, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / Rattray Head Lighthouse, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Philip Stephen / View of Rattray Head Lighthouse across sand dunes, north-east Scotland, January 2014. All non-editorial uses must be cleared individually.

Aflo / Hokkaido horses / Dosanko grazing, Shiriyazaki Lighthouse, Shimokita Peninsula National Park, Hokkaido, Japan. July 2012.

Michael Pitts / Europa Point Lighthouse at dawn, looking east into the Mediterranean Sea, Gibraltar, December.

Michael Pitts / Europa Point Lighthouse at dawn, looking east into the Mediterranean Sea, Gibraltar, December.

Mark Taylor / Waves breaking over lighthouse at Newhaven Harbour wall viewed from Seaford, Sussex, England, UK, 15th February 2014.

Philippe Clement / Portland Bill Lighthouse and stone signpost for the coast path on the Isle of Portland along the World Heritage Jurassic Coast, Dorset, UK, November 2012

Philippe Clement / Portland Bill Lighthouse on the Isle of Portland along the World Heritage Jurassic Coast, Dorset, UK, November 2012

Philippe Clement / Portland Bill Lighthouse on the Isle of Portland along the World Heritage Jurassic Coast, Dorset, UK, November 2012

Philippe Clement / Portland Bill Lighthouse on the Isle of Portland along the World Heritage Jurassic Coast, Dorset, UK, November 2012

Scott Leslie / East Quoddy Lighthouse at dusk, Campobello Island, Bay of Fundy, Canada

Mike Potts / Harebells on east slope on Bardsey Island, with a lighthouse in the distance. North Wales, UK, August 2012

Kirkendall-Spring / Western gulls (Larus occidentalis) nesting along the trail across East Anacapa Island with with East Anacapa Island lighthouse in background, Channel Islands National Park, California, USA, April 2011...

Kirkendall-Spring / Western seagull (Larus occidentalis) nesting among invasive Ice plant (Mesembryanthemum sp) and Tickseed (Coreopsis sp) with East Anacapa Island lighthouse in background, Channel Islands National Park...

Kirkendall-Spring / Western seagull (Larus occidentalis) among invasive Ice plant (Mesembryanthemum sp) with East Anacapa Island Lighthouse beyond, Channel Islands National Park, California, USA, April 2011.

Kirkendall-Spring / East Anacapa Island lighthouse, Channel Islands National Park, California, USA, April 2011.

Kirkendall-Spring / East Anacapa Island lighthouse with Western seagulls (Larus occidentalis) in foreground, Channel Islands National Park, California, USA, April 2011.

Kirkendall-Spring / East Anacapa Island lighthouse with Western seagulls (Larus occidentalis) in foreground, Channel Islands National Park, California, USA, April 2011.

Kirkendall-Spring / Old coast guard buildings, which are currently park service buildings with the lighthouse on East Anacapa Island in background, Channel Islands National Park, California, USA, April 2011.

Ross Hoddinott / View of Portland Bill lighthouse and coastline in evening light, Portland, Near Weymouth, Dorset, UK, February 2012.

Robert Thompson / Aerial view of the East Lighthouse, Rathlin Island, County Antrim, Northern Ireland, UK, September 2009

Ross Hoddinott / Portland Bill lighthouse, long exposure, Portland, near Weymouth, Dorset, England, UK. February 2010.

Philip Dalton / Castle ruins and Lighthouse on Bass Rock in the Firth of Forth, East Lothian, Scotland, UK

Philip Dalton / Castle ruins and Lighthouse on Bass Rock in the Firth of Forth, East Lothian, Scotland, UK

Guy Edwardes / Flowering Fleabane (Erigeron glaucus) with Portland Bill Lighthouse in the distance, Isle of Portland, Dorset, England, June 2006

Ross Hoddinott / Portland Bill lighthouse and coastline, Portland, near Weymouth, Dorset, UK. April 2009.

Peter Lewis / Portland Bill Lighthouse, with Sea thrift flowering in the foreground, Dorset, UK

Peter Lewis / Portland Bill Lighthouse, with Sea thrift flowering in the foreground, Dorset, UK

Peter Lewis / Portland Bill Lighthouse with Sea Thrift, May, Dorset, UK

Doug Wechsler / East Point Lighthouse (erected 1849) near mouth of Maurice River, Delaware Bay, New Jersey, USA

David Noton / Heavy seas, large waves crashing against rocks, Portland, Dorset, England, UK

Scott Leslie / East Quoddy Lighthouse at dusk, Campobello Island, Bay of Fundy, Canada

Scott Leslie / East Quoddy Lighthouse at dusk, Campobello Island, Bay of Fundy, Canada

Scott Leslie / East Quoddy Lighthouse at dusk, Campobello Island, Bay of Fundy, Canada

Onne van der Wal / Grand Banks motoryacht moored off a small lighthouse on the east coast, USA.

Philip Stephen / Buchanness lighthouse and boats pulled up onto the hard, North East Scotland. Spring 2005.

Onne van der Wal / Grand Banks motoryacht moored off a small lighthouse on the east coast, USA.

Onne van der Wal / Grand Banks motoryacht moored off a small lighthouse on the east coast, USA.

Onne van der Wal / Grand Banks motoryacht moored off a small lighthouse on the east coast, USA.

Onne van der Wal / Castle Hill Light house surrounded by snow under a wintery sunset. Established in 1890, the lighthouse marks the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.

Onne van der Wal / Castle Hill Lighthouse surrounded by snow under a wintery sunset. Established in 1890, the lighthouse marks the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.

Onne van der Wal / Established in 1890, the Castle Hill Lighthouse and Castle Hill Inn mark the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.

Onne van der Wal / Castle Hill Lighthouse (Est 1890) near Newport, Rhode Island, marking the East Passage into Narragansett Bay.

Onne van der Wal / Castle Hill Lighthouse (Est 1890) at dusk near Newport, Rhode Island, marking the East Passage into Narragansett Bay.

Onne van der Wal / Castle Hill Lighthouse (Est. 1890) near Newport, Rhode Island, marking the East Passage into Narragansett Bay.

Onne van der Wal / Established in 1890, the Castle Hill Lighthouse marks the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.

Onne van der Wal / Established in 1890, the Castle Hill Lighthouse and Castle Hill Inn mark the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.

Onne van der Wal / Castle Hill Lighthouse (Est 1890) near Newport, Rhode Island, marking the East Passage into Narragansett Bay.

Onne van der Wal / Established in 1890, the Castle Hill Lighthouse and Castle Hill Inn mark the East Passage into Narragansett Bay, near Newport, Rhode Island, USA.