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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
Historic traditional water wheel irrigation system, Betancuria, Fuerteventura, Canary Islands, Spain, Atlantic, Europe
Raufarholsheillir lava tube cave system, Iceland, Polar Regions
Heliostats reflecting sun rays, solar energy scientific research centre, AORA Tulip System, Tabernas, Almeria, Andalusia, Spain, Europe
Harder Kulm train, Interlaken, 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
Tram, the main transport system in Budapest, Hungary, Europe
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
Train of cogwheel railway at Schynige Platte, Jungfrau Region, Bernese Oberland, Switzerland
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
Historic communal well, El Pozo de los Frailes, Cabo de Gata Natural Park, Nijar, Almeria, Andalusia, Spain, Europe
Clouds at sunset, Pangalanes Lakes canal system, Tamatave, Madagascar, Africa
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
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
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
An El train on the Elevated train system crossing Wells Street Bridge, Chicago, Illinois, United States of America, North America
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
MTR sign, Hong Kong's mass transit railway system, Hong Kong, China, Asia
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
Tram, the main transport system in Budapest, Hungary, Europe
Electric powered modern trolley bus public transport rapid transit system, Centro Historico, Mexico City, Mexico, North America
Tram system in Birmingham which runs from Birmingham to Wolverhampton, Birmingham, England, United Kingdom, Europe
Cave system in the Virunga National Park, Rwanda, Africa
Skyline and Dubai Metro, Modern Elevated Metro system, opened in 2010, Dubai, United Arab Emirates, Middle East
Hong Kong's public tranist system Mass Transit Railway (MTR), Kowloon, Hong Kong, China, Asia
Cave system in the Virunga National Park, Rwanda, Africa
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
An El train on the Elevated train system, Chicago, Illinois, United States of America, North America
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
Foggy Bottom Metro station platform, part of the Washington D.C. metro system, Washington D.C., United States of America, North America
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
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 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.
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 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.
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
Aerial vertical drone perspective of the Baixa district with its iconic grid system leading to the Commerce Square and Tagus River, Lisbon, Portugal, Europe
A technical cave diver using a diver propulsion vehicle (DPV) to dive into the Blue Springs state park cave system near Marianna, Florida.
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
View of Japanese rickshaw (jinrikisha) in busy street scene, Asakusa, Taito City, Tokyo, Honshu, Japan
The iron ore mine Cockerill d'Esch-sur-Alzette played a major role in economic boom from the 1870s to the 1990s, Luxembourg
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
Metro railway on St-Martin bridge under the Bessieres bridge with Cathedral of Notre Dame in background, Lausanne, Canton of Vaud, Switzerland
Irrigation canal in palm grove. Birkat Al Mouz, Al Dakhliya region, Falaj irrigation system (Falaj Al-Khatmeen), UNESCO, Oman, Arabian Peninsula
Bathers in irrigation canal, Birkat Al Mouz, Al Dakhliya region, Falaj irrigation system (Falaj Al-Khatmeen), UNESCO, Oman, Arabian Peninsula
Bathers in irrigation canal, Birkat Al Mouz, Al Dakhliya region, Falaj irrigation system (Falaj Al-Khatmeen), UNESCO, Oman, Arabian Peninsula
School bus in front of a school, Al Sharqiyah region, Sultanate of Oman, Arabian Peninsula
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai man at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai woman at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai women at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
Maasai beadwork at the Predator Compensation Fund Pay Day, Mbirikani Group Ranch, Amboseli-Tsavo eco-system, Kenya, East Africa, Africa
View of bullet train passing over bridge with city traffic, Minato City, Tokyo, Honshu, Japan
View of intricate rail and road network crossing, Minato City, Tokyo, Honshu, Japan
View of interior and train at Abholer-Parkplatz Spandau Bahnhof, Spandau, Berlin, Germany
View of interior at Abholer-Parkplatz Spandau Bahnhof, Spandau, Berlin, Germany
Green tram and Nam Tin building, North Point, Hong Kong, China
Underwater marine life on coral reefs, Thailand
Ribera dos Caldeiroes waterfalls, near Achada, Sao Miguel, Azores Islands, Atlantic, Portugal
Traffic on a busy intersection on Sheikh Zayed highway, Dubai, United Arab Emirates
View of Skyway Monte Bianco cable car and snow covered mountain from Entreves in winter, Entreves, Aosta Valley, Italian Alps, Italy
Irrigation canal, Falaj irrigation system (Falaj Al-Khatmeen), UNESCO, palm grove, Birkat Al Mouz, Al Dakhliya region, Jebel Akhdar foothills, Oman
Rows of dye-filled stone basins in a traditional leather tannery in Fes, Morocco
View of trains from the Lotus Tower, Colombo, Sri Lanka
View of trains from the Lotus Tower, Colombo, Sri Lanka
The new elevator of the thermal baths using a wastewater-based system, Saint Gervais, Haute-Savoie, France
A vibrant view of Tokyo skyline featuring train tracks weaving through modern skyscrapers in a busy district, Tokyo, Honshu, Japan
A vertical shot of a Hong Kong Tram passing the colonial Old Supreme Court building, Hong Kong, China
A funicular railway car in a station, Naples, Campania, Italy
Local transport on the Sangha River, Ouesso, Republic of Congo
Johns Hopkins Glacier, Glacier Bay National Park in Southeast Alaska, United States of America
Centuries Old Cannon Artillery, Castle of the Three Kings of Morro, UNESCO, Havana, Cuba
Adult Svalbard reindeer (Rangifer tarandus platyrhynchus) grazing within the town limits of Longyearbyen, Svalbard, Norway
Trans-Alaska Pipeline System, Fairbanks, Alaska, United States of America, North America