The archaeological Park of Solsticio is located in the state of Amapa. In Portuguese, its name means "Solstice". In the spring of 2006 scientists in the area was discovered cromlech – circle of stones (megalithic monument). In diameter it is 30 meters, the height of granite stelae - about 4 meters. Similar Observatory was discovered in French Guiana. Often the cromlech in Solsticio compare with other megalithic monuments found in Europe, Asia and North America. The monument in Solsticio called "Amazon Stonehenge". Near the cromlech archaeologists discovered the remains of ceramics. After reviewing them, they came to the conclusion that the construction can be dated to about 1 to 15 century ad

The blocks that make up the cromlech, set vertically, as identical circles on the top of the hill. December 21, the winter solstice and the shortest day in the Northern hemisphere, the shadow of one of the sides disappear. This occurs when directly above it appears the sun. It is the fact that the unit is correctly aligned with the solstice and led scientists to assume astronomical purpose of the cromlech. The second hypothesis suggests that the cromlech is the temple. The priests, based on the position of the stars, participated in the rituals of a religious nature.

Excavations in the archaeological Park of Solsticio are systematically. Currently found fossils can neither confirm nor deny the hypothesis about the Observatory.

Now the archaeological Park of Solsticio – a very popular place among tourists and among historians – Amateurs.