Once a vital storage site and wartime landmark, the now-abandoned silo of the Zettinger Mill stands as a mysterious relic of Luxembourg's industrial past, leaving questions about its future.

It is a building that immediately catches the eye as it towers over Bettendorf, monumental and a little mysterious. The silo of the Zettinger Mill is more than just an abandoned industrial structure: it is a piece of regional history.

For decades grain was stored here, and during both the First and Second World Wars the silo played an important role. Today, however, it stands empty.

The machines stopped turning long ago, but the striking yellow walls remain as witnesses to years of hard work and the end of an era. The question now is what will become of the silo, which today belongs to the municipality, and what stories are hidden within this enigmatic place?

In "Top Secret", RTL takes a look behind the façade of the silo!