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Chinese girl under a glazed archway at the Confucius Temple Imperial College, built in 1306 by the grandson of Kublai Khan, administering the official Confucian examination system, Beijing, China, Asia
Confucius Temple and Imperial College built in 1306 by the grandson of Kublai Khan and administered the official Confucian examination system, Beijing, China, Asia
Teleferica de Gaia cable car system, Vila Nova de Gaia, Porto, Portugal, Europe
Historic communal well, El Pozo de los Frailes, Cabo de Gata Natural Park, Nijar, Almeria, Andalusia, Spain, Europe
Historic traditional water wheel irrigation system, Betancuria, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Raufarholsheillir lava tube cave system, Iceland, Polar Regions
Heliostats reflect sunrays to receiver tower, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Array of solar panels on a bright sunny day, Sierra Alhamilla, near Nijar, Almeria, Andalusia, Spain, Europe
Heliostats reflecting sun rays, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Harder Kulm train, Interlaken, Bernese Oberland, Switzerland
Train of cogwheel railway at Schynige Platte, Jungfrau Region, Bernese Oberland, Switzerland
Sheffield trams (Supertram) approaching a stop in Church Street, Cathedral Quarter, Sheffield, Yorkshire, England
Sheffield tram (Supertram) on overhead track approaching Commercial Street from Park Square, Sheaf Valley Quarter, Sheffield, Yorkshire, England
Sheffield Railway station seen from the east with Supertram stop in foreground and city centre behind, Granville Street, Sheffield, Yorkshire, England
Cham people using a Dai fishing system for trei real fish on the Tonle Sap River, Cambodia, Indochina, Southeast Asia, Asia
Cham people using a Dai fishing system for trei real fish on the Tonle Sap River, Cambodia, Indochina, Southeast Asia, Asia
The queen of roads of the old Roman Road system was the Appian Way linking Rome to the south of Italy, Rome, Lazio, Italy, Europe
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
Tram, the main transport system in Budapest, Hungary, Europe
An El train on the Elevated train system crossing Wells Street Bridge, Chicago, Illinois, United States of America, North America
Historic traditional water wheel irrigation system, Betancuria, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Mid-Levels Escalators, the longest outdoor covered escalator system in the world at 800 metres, linking the Mid-Levels with Central, Hong Kong Island, Hong Kong, China, Asia
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
An El train on the Elevated train system crossing Wells Street Bridge, Chicago, Illinois, United States of America, North America
Skyline and Dubai Metro, Modern Elevated Metro system, opened in 2010, Dubai, United Arab Emirates, Middle East
Tram, the main transport system in Budapest, Hungary, Europe
Tram system in Birmingham which runs from Birmingham to Wolverhampton, Birmingham, England, United Kingdom, Europe
Cave system in the Virunga National Park, Rwanda, Africa
Cave system in the Virunga National Park, Rwanda, Africa
The site of the Commandants House showing supports for suspended floor system with hot air to heat rooms above, dating from AD138, Cilurnum (Chesters Roman Fort), Hadrian's Wall, UNESCO World Heritage Site, Chollerford, Northumbria National Park, England, United Kingdom, Europe
Metra rail system, station sign in the style of the Paris Metro, Chicago, Illinois, United States of America, North America
Metra rail system, station sign in the style of the Paris Metro, Chicago, Illinois, United States of America, North America
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
Electric powered modern trolley bus public transport rapid transit system, Centro Historico, Mexico City, Mexico, North America
MTR sign, Hong Kong's mass transit railway system, Hong Kong, China, Asia
Foggy Bottom Metro station platform, part of the Washington D.C. metro system, Washington D.C., United States of America, North America
An El train on the Elevated train system, Chicago, Illinois, United States of America, North America
Tram system in Birmingham which runs from Birmingham to Wolverhampton, Birmingham, England, United Kingdom, Europe
Hornsund, a fjord system on the western coast of Spitsbergen, Svalbard Archipelago, Arctic, Norway, Europe
Hornsund, a fjord system on the western coast of Spitsbergen, Svalbard Archipelago, Arctic, Norway, Europe
Modern road system leading to the Commercial Centre, Tel Aviv, Israel, Middle East
U-Bahn Metro System, Nuremberg, Bavaria, Germany, Europe
A woman wearing a protective hygiene (pollution) face mask on the London Underground subway system, London, England, United Kingdom, Europe
A woman wearing a protective hygiene (pollution) face mask on the London Underground subway system, London, England, United Kingdom, Europe
The Light Rail Transit system with the skyline of the city of Kuala Lumpur behind, Malaysia, Southeast Asia, Asia
POV on the modern driverless Dubai elevated Rail Metro System, running alongside the Sheikh Zayed Road, Dubai, United Arab Emirates, Middle East
Hong Kong mass transit railway system (MTR), Hong Kong, China, Asia
A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.
A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of the Blue Hole in Lighthouse Reef in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.
A beautiful coral reef, dominated by colorful gorgonians, grows along the edge of Turneffe Atoll in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.
A colorful West Indian starfish, Oreaster reticulatus, crawls over a shallow, sandy seafloor in Turneffe Atoll in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.
A colorful West Indian starfish, Oreaster reticulatus, crawls over a shallow, sandy seafloor in Turneffe Atoll in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth.
A well-camouflaged yellow stingray, Urobatis jamaicensis, swims over a shallow seagrass meadow growing within Turneffe Atoll's lagoon in the Caribbean Sea. This reef is part of the massive Mesoamerican Reef System, the second largest barrier reef on Earth
A large roughtail stingray, Dasyatis centroura, lays on the seagrass-covered seafloor of Turneffe Atoll off the coast of Belize. This reef is part of the massive Mesoamerican Reef System in the Caribbean Sea, the second largest barrier reef on Earth.
AI generated image of a Futuristic humanoid robot working in a car assembly production line
AI generated image of a Dog robot jumping over barrels in front of a white background
Bicycle-sharing system in Zona Rosa area, Bogota, Colombia, South America
Bicycle-sharing system in Zona Rosa area, Bogota, Colombia, South America
Mixed paddy fields growing vegetables under the highly efficient Jhum system of slash and burn and varied crops, Nagaland, India, Asia
Terraced rice valley, Isalo National Park, Madagascar
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America (Excess steam is vented from orange and white funnels known as stacks.)
Steam emitted from the New York Steam System, dating back to 1882 providing steam to heat, cool or disinfect around 1,700 buildings, New York, United States of America, North America
Hue Historic Citadel, Hue, Thua Thien Hue, Vietnam
Times Square, subway station and train, New York, USA
A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.
Bas-reliefs of Hindu epic Ramayana and Bhagavata Purana, Prambanan, 9th century Hindu temple, UNESCO, Java, Indonesia
Technical diver in cave system, Mexico.
Diver enters the cavern system at Chac Mool cenote in the Riviera Maya area of Mexico's Yucatan Peninsula.
A cavern diver ascends into the light filtering into cenote system at Yucatan Peninsula, Mexico.
Two scuba divers in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
A cavern diver enters the Taj Mahal cenote system on Mexico's Yucatan Peninsula.
Cavern divers enter cenote system in Mexico's Yucatan Peninsula.
Scuba diver in the Garden of Eden cavern part of the cenote system on the Yucatan Peninsula of Mexico.
Llanfair Light Railway, Llanfair Caereinion, Welshpool, Powis, Wales, United Kingdom
The Coconino Overlook along the North Kaibab Trail at Grand Canyon North Rim, UNESCO, Arizona, United States of America
The interior of the Supai Tunnel along the North Kaibab Trail, Grand Canyon North Rim, UNESCO, Arizona, United States of America
View of Japanese rickshaw (jinrikisha) in busy street scene, Asakusa, Taito City, Tokyo, Honshu, Japan
View of vintage tram and colourful buildings in the Alfama District on a sunny day, Lisbon, Portugal, Europe
View of Campo Pequeno Metro Station interior, Lisbon, Portugal, Europe
View of vintage yellow No28 tram on a sunny day in the Alfama District, Lisbon, Portugal, Europe
View of vintage Gloria Funicular at dusk, hilltop tram ride, Lisbon, Portugal, Europe
Canoe net fishermen on Mono River mouth in Grand-Popo area, Benin,Gulf of Guinea,West Africa
Copenhagen, Denmark ��� View of Christiansborg Palace, home to Denmark���s Parliament, Supreme Court, and Royal Reception Rooms, symbolizing centuries of political and royal power.
View of vintage trams in Alfama, Alfama District, Lisbon, Portugal, Europe
View of vintage tram and colourful architecture in Alfama, Alfama District, Lisbon, Portugal, Europe
View of vintage trams and colourful architecture in Alfama, Alfama District, Lisbon, Portugal, Europe
View of vintage No28 yellow tram in Lisbon city centre, Lisbon, Portugal, Europe
Mahaweli River, Uva province, Sri Lanka, Indian subcontinent, South Asia
Postojna Caves, Postojna, Slovenia, Eastern Europe
Postojna Caves, Postojna, Slovenia, Eastern Europe
Postojna Caves, Postojna, Slovenia, Eastern Europe
Crossrail Station, Canary Wharf, London, England,
Aerial of Sewell Mining Town, UNESCO World Heritage Site, Chile, South America
View of bullet train in Kanazawa Station, Kanazawa City, Ishikawa Prefecture, Honshu, Japan
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan
Elevated view of traffic and tram on major street during daytime, Hondori, Naka Ward, Hiroshima, Honshu, Japan