Malta at 2021.

200-feet concrete sound mirror, for detecting enemy's airplanes.

Made 1935, abandoned already 1937 - the development of velocities of the planes and detecting radar systems was so rapid...

My travels north... Czechia

Fortress Terezin (2017)

Fortress Josefov (2019)

Me in the uniform of a military engineer (on left) at Josefinske slavnosti in 2017. during the reenacting of the siege of Olmütz in 1758 during the Seven Years' War.