Pyramids of Plaine Magnien
Plaine Magnien, Mauritius
Stepped stone cairns. Height: 10 m. Date: Attributed to field-clearing work between the 1930s and 1960s, with no in-depth scientific research.
Pile of stones removed from sugar cane fields. News sources describe seven basalt cairns, one 10 m tall according to African Arguments, while Atlas Obscura puts them at around 20 m.