In 3 years of postcrossing, this is my 1st aurora borealis card and this was one of my favorite cards. I'm really happy that Paula "xpaula" sent it to me :)
"Auroras, sometimes called the northern and southern (polar) lights, are natural light displays in the sky, usually observed at night, particularly in the polar regions. They typically occur in the ionosphere. They are also referred to as polar auroras. In northern latitudes, the effect is known as the aurora borealis, named after the Roman goddess of dawn, Aurora, and the Greek name for north wind, Boreas, by Pierre Gassendi in 1621. The aurora borealis is also called the northern polar lights, as it is only visible in the sky from the Northern Hemisphere, the chance of visibility increasing with proximity to the North Magnetic Pole, which is currently in the arctic islands of northern Canada. Auroras seen near the magnetic pole may be high overhead, but from further away, they illuminate the northern horizon as a greenish glow or sometimes a faint red, as if the sun were rising from an unusual direction. The aurora borealis most often occurs near the equinoxes; from September to October and from March to April.

"The Yeomen Warders of Her Majesty's Royal Palace and Fortress the Tower of London, popularly known as the Beefeaters, are ceremonial guardians of the Tower of London. In principle they are responsible for looking after any prisoners at the Tower and safeguarding the British crown jewels, but in practice they act as tour guides and are a tourist attraction in their own right, a point the Yeoman Warders acknowledge.
 Yeoman Warders began guarding the Tower in 1485; today there are 35 Yeomen Warders and one Chief Warder. All warders are retired from the Armed Forces of Commonwealth realms and must be former senior non-commissioned officers with at least 22 years of service. They must also hold the Long Service and Good Conduct medal." - in: wikipedia

"Lonar Lake, which was created by a meteor hitting the Earth during the Pleistocene epoch, is a saltwater lake in Buldana district, Maharashtra, India. The crater thereby formed is the only hypervelocity meteoritic impact crater on basalt rock. A lake that evolved in the resulting basaltic rock formation, is both saline and alkalie in nature. Geologists, ecologists, archaeologists, naturalists and astronomers have reported several studies on the various aspects of this crater lake ecosystem. Lonar Lake has a mean diameter of 1.2 kilometres (3,900 ft) and is about 137 metres (450 ft) below the crater rim. The meteor crater rim is about 1.8 kilometres (5,900 ft) in diameter. The circular depression bears a saline water lake in its central portion. The crater's age is estimated to be 52,000 ± 6,000 years (Pleistocene). It is the second largest impact crater in basaltic rock and is partially filled by a salt water lake." - in: wikipedia
The card was sent from India by "yeuxnoisette".
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Yukie "yukina" from Japan sent this mapcard of the Okinawa Island.
Okinawa Island is the largest of the Ryukyu Islands of Japan, and is home to Naha, the capital of Okinawa Prefecture.

The 1st brazilian card of this RR is a card from Curitiba sent by "tarcício". 
Curitiba is the capital city of the Brazilian state of Paraná. The city has the largest population and also the largest economy in Southern Brazil. According to the American magazine Reader's Digest, Curitiba is the best place to live in Brazil. 
Also from the USA, is this Columbia card sent by Amanda "uscshameless".
"Columbia is the state capital and largest city in the U.S. state of South Carolina The population was 116,278 according to the 2000 census (2008 population estimates put the city at 127,029). Columbia is the county seat of Richland County, but a portion of the city extends into Lexington County. The city is the center of a metro area of 728,063. The city's name comes from a poetic synonym for America, derived from the name of Christopher Columbus." - in: wikipedia 


"The Imperial Abbey of Lorsch in Lorsch, about 10 km (6 miles) east of Worms, was one of the most renowned monasteries of the Carolingian Empire. Even in its ruined state, its remains are among the most important pre-Romanesque buildings in Germany. Its chronicle, entered in the Lorscher Codex compiled in the 1170s (now in the state archive at Würzburg) is a fundamental document for early medieval German history. Another famous document from the monastic library is the Codex Aureus of Lorsch. In 1991 the ruined abbey was listed as a UNESCO World Heritage Site." - in: wikipedia
This is the Cacheu river, also known as Farim river.
Américo said, this traditional singing group was singing me a birthday song ;)
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Katy "katyC" sent be this beautiful Colorado landscape, the scenic splendor of the Trappers Lake in the White River National Forest..jpg)
This is also a beautiful view. I love the autumn colors..jpg)
These lovely 19th century windmills are located in Pyrohiv, originally a village south of Kiev, now a neighborhood in the southern outskirts of the Ukrainian capital city. It houses an outdoor Museum of Folk Architecture and Life of Ukraine. .jpg)
Ari "AKS", from Finland, sent this card of Jean-Sibelius house in Järvenpää..jpg)
DE-463591, sent by Sandra.
AU-58016, sent by Jane.
The card is from one of my must see places in France, the Loire Valley. 
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"Khao Yai National Park is a national park in Thailand. 
This is a portuguese card sent by Joana "joaninha". 
My 2nd card of the RR from Turkey. This Topkapi Palace card was sent by Gokçe.
A card from China sent by "Nommy".