Aavasaksa is a sharp-edged hill in Ylitornio municipality in Finnish Lapland.

[1][2] Decorative hunting cabin "Imperial Lodge" (Keisarinmaja) is one of the buildings on top of the hill.

Its construction began with a visit by Alexander II of Russia in mind, but due to political instability it never happened.

[3] Due to Aavasaksa's distinctive elevation above other nearby hills, it was first used by Pierre Louis Maupertuis in the French Geodesic Mission (1736–1737), and later became part of the Struve Geodetic Arc.

Aavasaksa is often considered the southernmost point in Finland where the midnight sun is literally visible.