This place is known as Cal Orcko.
Cal Orcko is a palaeontological site. It is the site with traces of dinosaurs in the world, as it contains over 5,000 tracks of 294 species of dinosaurs.
The discovery is an enormous contribution to the history and science, revealing data known so far about the end of the period Cretaceous and the beginning of the Tertiary , about 66 million years, and documenting the high diversity of dinosaurs better than any other place in the world.
It's situated in Bolivia and is famous for more than 5000 dinosaur tracks that can be found in the wall.
Scientists assume that more than 68 million years ago, thousands of dinosaurs flocked at Cal Orko (a lakeside in those times) in search of food and water