Calcite, Chlorite Group from Iraí, Alto Uruguai region, Rio Grande do Sul, South Region, Brazil
Cânion do Itaimbezinho - Parque Nacional dos Aparados da Serra, Rio Grande do Sul/Santa Catarina, Brasil (by Jesús Gabán)
As the River Flows
Cânion Fortaleza / Fortaleza Canyon, Cambará do Sul, RS, Brazil by Cassio Dorneles, via Flickr
Abismo Anhumas - A cave in Bonito, Mato Grosso do Sul (in Brazil). This cave is equipped with a scuba diving platform and sunlight reaches down to the bottom during certain parts of the day.
places i've been
Bandelier State Park - New Mexico - Most of the pueblo structures date to two eras, in total from 1150 to 1600 AD. Permanent settlements by ancestors of the Puebloan peoples have been dated to 1150 CE; these settlers had moved closer to the Rio Grande by 1550.