The best way to complete this sentence is "The Sima de Huesos" located in Spain contains humanfossils.
<h3>What is "The Sima de Huesos"?</h3>
This is a cavity that can be found near Burgos and that have helps paleontropologies to understand the process of hominization or the process of evolution that led to the humanspecies.
<h3>What does this place contain?</h3>
This place contain a large variety of humanfossils. Indeed it is the place with the most human fossils.