In 1911, Hiram Bingham was the first scientist to ever visit Machu Picchu. Now more than 500,000 people visit the ruins each year.

 
Tiwanaku ceramic vessel in museum in La Paz, Bolivia; evidence of South Americans taking hallucinogens dates back at least to the Chavin culture, in north/central Peru, which flourished from 1,000 to 200 B.C.

 
Andean Mummy Hairs Show Hallucinogen Use Discovery News
Oct. 29, 2008 — Andean mummy hair has provided the first direct archaeological evidence […]