Vasco da Gama bridge over the Rio Tejo (Tagus River), Europe's longest bridge, Lisbon, Portugal, Europe

U Bein's Bridge across Thaungthaman Lake, at 1.2 km long the world's longest teak bridge, Amarapura, Myanmar (Burma), Asia

Boat on Thaungthaman Lake, and U Bein's Bridge, at 1.2 km long the world's longest teak bridge, Amarapura, Myanmar (Burma), Asia

Aerial image of Southend Pier, the longest pleasure pier in the world, and estuary of the River Thames, Southend-on-Sea, Essex, England, United Kingdom, Europe

The Yellow River (Huang He) at 5464 kilometers, the second longest river in China, after the Yangtze, and the sixth-longest in the world, at sunrise, Sichuan Province, China, Asia

The Yellow River in Sichuan Province, the second longest river in China after the Yangtze, Sichuan, China, Asia

The sources of River Po, the longest in Italy, by Monviso (Monte Viso) mountain, Piedmont, Italy, Europe

The Vasco da Gama Bridge, Europe's longest, over the Tejo River Estuary, Mer de Paille, in Lisbon, Portugal, Europe

Ancient canal in the city, part of the Great Canal, the longest in China, Soochow (Suzhou), China, Asia

Tourists in paddle boat at entrance to Riverine Cave. longest navigable river traversed tunnel in the world, Subterranean River National Park, Sabang Town, Palawan, Philippines, Southeast Asia, Asia

Vasco da Gama bridge over the Tejo river, Europe's longest bridge, Lisbon, Portugal, Europe

With a surface area of 68,800-úsquare kilometres (26,600-úsq-úmi), Lake Victoria is AfricaG®ös largest lake, and the largest tropical lake in the world. The Rail track meanders across Lake Victoria, just upstream from where the Victoria Nile river forms. This is the furthest point, and considered the source of the River Nile, the worldG®ös longest river. Jinja, Uganda, East Africa

View of Tara Bridge and Tara Valley under clouded sky, Montenegro, Europe

Sunset at the Magdeburg waterway junction, Mittelland Canal leads in trough bridge over Elbe, longest canal bridge in Europe, Hohenwarthe, Saxony-Anhalt, Germany, Europe

Sunset at the Magdeburg waterway junction, Mittelland Canal leads in trough bridge over Elbe, longest canal bridge in Europe, Hohenwarthe, Saxony-Anhalt, Germany, Europe

Sunrise colors the clouds reflected in Tagus River and frame the Vasco da Gama bridge in Lisbon, Estremadura, Portugal, Europe

Elderly man in a dugout canoe beside a large fishing boat. Sulima is a fishing village on the Alantic coast at the mouth of the Moa River near the Liberian border. Along its pristine beach, one of the longest in West Africa, fishermen launch dugout canoes and fish with nets drag back manually from the shore. Larger power boats mainly from Ghana leave from the more sheltered harbour on the Moa River. Most of the fish is smoke dried by the women of the village and then sold in markets as far off as Monrovia, Liberia.

Young boys looking out over the town's port. Sulima is a fishing village on the Alantic coast at the mouth of the Moa River near the Liberian border. Along its pristine beach, one of the longest in West Africa, fishermen launch dugout canoes and fish with nets drag back manually from the shore. Larger power boats mainly from Ghana leave from the more sheltered harbour on the Moa River. Most of the fish is smoke dried by the women of the village and then sold in markets as far off as Monrovia, Liberia.

Group of young men pulling a fishing boat out of the ocean. Sulima is a fishing village on the Alantic coast at the mouth of the Moa River near the Liberian border. Along its pristine beach, one of the longest in West Africa, fishermen launch dugout canoes and fish with nets drag back manually from the shore. Larger power boats mainly from Ghana leave from the more sheltered harbour on the Moa River. Most of the fish is smoke dried by the women of the village and then sold in markets as far off as Monrovia, Liberia.

Elderly woman making a funny face. Sulima is a fishing village on the Alantic coast at the mouth of the Moa River near the Liberian border. Along its pristine beach, one of the longest in West Africa, fishermen launch dugout canoes and fish with nets drag back manually from the shore. Larger power boats mainly from Ghana leave from the more sheltered harbour on the Moa River. Most of the fish is smoke dried by the women of the village and then sold in markets as far off as Monrovia, Liberia.

Carrick-On-Shannon, River Shannon, County Leitrim, Ireland