The Brusio spiral viaduct is a single track nine-arched stone spiral railway viaduct located in Brusio, in the Canton of Graubünden, Switzerland. Like most spiral tracks, the Brusio spiral viaduct was...
The pygmy marmoset is a tiny primate that is native to rainforests of the western Amazon Basin in South America. At just 100 grams, the pygmy marmoset is known to be the smallest known species of monkey...
Cenotes are natural pits or sinkholes resulting from the collapse of limestone bedrock that exposes groundwater underneath. They are especially associated with the Yucatán Peninsula of Mexico, which is...