At least 35 small pyramids, along with graves, have been discovered, between 2009 and 2012, densely clustered at a site called Sedeinga in Sudan. This high concentration is a surprise for experts and scientists. 2011 was the most effective field season as 13 pyramids were discovered packed into roughly 5,381 square feet (500 square meters), or slightly larger than an NBA basketball court.
These pyramids are around 2,000 years old and were constructed as the Kush kingdom flourished in Sudan. Kush shared a border with Egypt and, later on, the Roman Empire. The desire of the kingdom’s people to build pyramids was apparently influenced by Egyptian funerary architecture. – Live Science