The Sima de los Huesos site contains the largest collection of Middle Pleistocene human fossils ever discovered.
Researchers identified DNA sequences from 400,000-year-old bear fossils at the site, the oldest hominid-related DNA recovered to date.
Homo antecessor was formally defined as a new species based specifically on findings from the Gran Dolina site within the complex.
The archaeological record at Atapuerca spans three distinct stages of human evolution: Homo antecessor, Homo heidelbergensis, and Homo sapiens.
The railway cutting that first exposed the sites was created in the late 19th century for a mining project, unintentionally revealing the cave entrances.
Atapuerca is a UNESCO World Heritage site housing one of the most significant fossil records of human evolution in Europe. The site contains evidence of human occupation dating back over one million years, including the earliest known European hominid remains. Excavations center on the Trinchera del Ferrocarril, a railway cutting that exposed multiple cave systems containing stratified archaeological deposits. The site revealed the existence of Homo antecessor, a species considered the last common ancestor of modern humans and Neanderthals. Key discoveries include the Sima de los Huesos, an accumulation of at least 28 individual skeletons representing Homo heidelbergensis. These findings have radically altered the timeline of human migration into the European continent. Ongoing scientific research remains active, with the site serving as a living laboratory for paleoanthropological study. The site is managed in conjunction with the Museum of Human Evolution in nearby Burgos, which houses the original fossils.
The elevated viewing platform overlooking the Trinchera del Ferrocarril for a perspective of the deep geological layers.
Combine your visit to the outdoor site with the Museum of Human Evolution in downtown Burgos to see the actual fossil specimens.
Wear sturdy, closed-toe walking shoes as the terrain around the excavation trenches is uneven and rocky.
Book guided tour slots well in advance, as access to the active excavation pits is strictly regulated and limited in daily capacity.
Attempting to visit the archaeological trenches without a pre-booked guided tour, as they are not accessible for independent wandering.
Visits are strictly by guided tour; check the official portal for winter season operational adjustments.
Strictly follow guide instructions and stay within designated paths; do not touch any rock walls or excavation surfaces to prevent contamination.
