Tropical Stonehenge Discovered

A Brazilian archeological find of 127 granite blocks (some as high as three metres tall, spaced at regular intervals around a hill like a crown 30 metres in diameter) is believed to be the ruins of a centuries-old astronomical observatory. On December 21, the shortest day of the year, the shadow of one of the blocks disappears when the sun is directly above it. Think of it as the Western version of Stonehenge.