Argentina: Puente del Inca
Puente del Inca (Inca Bridge) was actually not built by the Inca civilization but is rather a spectacular natural phenomenon where various mineral deposits coming from hot springs high up in the Andes formed a natural bridge over the Cuevas River. The hot springs are extremely rich in mineral and an item placed in them gets mineralised all over in just a mater of weeks. It’s quite similar to travertine terraces at the Mammoth Hot Springs in Yellowstone or the white terraces in Pumukale in Turkey. The natural bridge itself is rather unstable so you can only view it from the observation platform in a distance.
