Ilumetsa is a set of two probable meteorite craters[1] in Estonia.

Recent radiocarbon dating charcoals buried within assumed proximal ejecta blankets of these crater-like features showed Ilumetsa Large and Ilumetsa Small formed simultaneously between 7170 and 7000 cal.

[4] No clear meteorite fragments or shock metamorphic effects were ever found around those structures.

However, indirect lines of evidence are enough to call it a "probable" impact site.

It is: 1) presence of deformed sedimentary beds (including the rim consisting of sands mixed with numerous clayey till lenses;,[5] 2) only a small thickness of glacial sediments,[2] 3) simultaneous formation of both structures as showed by radiocarbon dating.