Sơn Đoòng cave – Mountain River cave (Quảng Bình Province, Vietnam)


Sơn Đoòng cave is a cave in Phong Nha-Kẻ Bàng National Park, Vietnam, with a large fast-flowing underground river inside. The biggest chamber of Sơn Đoòng is more than five kilometers long, 200 meters high, and 150 meters wide. With these dimensions, Sơn Đoòng take the title of the world’s largest cave.

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Solkan Bridge (Nova Gorica, Slovenia)


The bridge was built between 1904 and 1905, being destructed in 1916 by the Austrians during the First World War to prevent the invading forces from using it. The actual bridge, reconstructed between 1925 and 1927 is very similar to the first one with the exception of having only four sub-arches instead of the original five. During the Second World War the bridge suffered only minimal damage from bomb attacks, which the Germans repaired in a few days. With an arch span of 85 m, it is the second-longest stone arch in the world and the longest stone arch among train bridges.

Confluence of Rhône and Arve rivers (Geneva, Switzerland)


Rising in the Graian Alps, close to the Swiss border, the Arve river receives water from the many glaciers of the Chamonix valley before flowing north-west into the Rhône river on the west side of Geneva, where its much higher level of silt brings forth a striking contrast between the two rivers.

Magdeburg Water Bridge (Saxony-Anhalt, Germany)


The Magdeburg Water Bridge is a navigable aqueduct in Germany, opened in October 2003 and part of the Magdeburg crossing of waterways. It connects the Elbe-Havel Canal to the Mittellandkanal, crossing over the Elbe River. It is notable for being the longest navigable aqueduct in the world, with a total length of 918 metres (3,012 ft).

Château de Chenonceau (Chenonceau, France)


The Château de Chenonceau is a manor house built on the site of an old mill on the River Cher, sometime before its first mention in writing in the 11th century. The original manor was torched in 1412 to punish owner Jean Marques for an act of sedition. He rebuilt a castle and fortified mill on the site in the 1430s.

Website: http://www.chenonceau.com/

Lençóis Maranhenses National Park (Maranhão, Brazil)


The Lençóis Maranhenses National Park (Parque Nacional dos Lençóis Maranhenses) is located in Maranhão state. It is an area of low, flat, occasionally flooded land, overlaid with large, discrete sand dunes. It encompasses roughly 1500 square kilometers, and despite abundant rain, supports almost no vegetation.

Website: http://www.parquelencois.com.br/

Devetashka cave (Lovech Province, Bulgaria)


The Devetashka cave is also known as Maarata or Oknata for its seven different-sized holes in the ceiling, through which sunlight penetrates and illuminates the central hall and part of its two fields. The studies showed that the Devetashka cave used to be inhabited during almost every historical era. The earliest traces of human presence date back to the middle of the Early Stone Age before about 70,000 years BC.

Details: http://bulgariatravel.org/en/object/355/Devetashka_peshtera

Iguazu Falls (Misiones Province, Argentina – Paraná, Brazil)


Iguazu Falls are waterfalls of the Iguazu River on the border of Brazilian State Paraná and Argentine Province Misiones. The name “Iguazu” comes from the Guarani or Tupi words “y”, meaning “water”, and “ûasú”, meaning “big”. Legend has it that a god planned to marry a beautiful woman named Naipí, who fled with her mortal lover Tarobá in a canoe. In rage, the god sliced the river, creating the waterfalls and condemning the lovers to an eternal fall.

Websites: http://www.iguazuargentina.com/http://www.cataratasdoiguacu.com.br