Wikipedia
Calçoene
Calçoene (Rudder Calcium) is a municipality located in the east of the state of Amapá in Brazil. It is located on the Atlantic Ocean in the Amazon River basin near French Guiana. Calçoene covers and has a population is 8,964.
Calçoene was home to a Russian émigré colony in its area in the first decades of 20th century. The city has the highest rainfall of any in Brazil, with an annual average of . Calçoene is noted for its ancient megalithic observatory, often referred to as the "Amazon Stonehenge".