Pyramids — 35, to be exact — have been discovered in Sudan at a site called Sedeinga.
The ancient structures date back around 2,000 years, and are believed to have been part of the Kush kingdom, which shared a border with Egypt and later, the Roman empire, according to NBC News.
The pyramids were very possibly influenced by Egyptian funeral architecture, LiveScience reported.
Researchers discovered the pyramids between 2009 and 2012, and are shocked about how dense they are concentrated: 13 of them are crammed into a space of just over 5,000 square feet — only slightly larger than an NBA basketball court, according to LiveScience.
Scientists speculate that the building was done over centuries, and that pyramids were moved in order to make more space for burials.
Most of the pyramids discovered are 22 feet wide at the base, but the smallest is just 30 inches wide at its base — most likely built for a child's burial, according to Science World Report.