El Fuerte de Samaipata also known simply as 'El Fuerte', is an archaeological site and UNESCO World Heritage Site located in Santa Cruz Department, Bolivia. It is situated in the eastern foothills of the Bolivian Andes, and is a popular tourist destination for Bolivians and foreigners alike. It is served by the nearby town of Samaipata. It is not actually a military fortification but is a pre-Colombian religious site, possibly built by the Incas. More recently, it has been pronounced to be a flying saucer launching and landing site by Von Danekin, well known author of "Chariots of the gods." This is lent credence in certain circles due to the parallel sloping grooves cut into the rock at the highest point of the site. Archaeologists, however, contend that the unusual carvings may be from a pre-Inca civilization on this Amazonian slope that was commemorating the flyover of a comet in 1066 CE.