The Iron Maiden’s Lullaby-Hard Riddles

Here’s a riddle from The Iron Maiden’s Lullaby-

The Iron Maiden’s Lullaby-Hard Riddles

Inside a museum, an old iron maiden hummed softly at night.
The sound was low, rhythmic, almost comforting.
What made the humming?

Answer:

Vibrations from nearby machinery resonating inside its iron cavity

Explanation:

The humming didn’t come from anything supernatural—it was caused by vibrations from nearby machinery in the museum. At night, when the building was quiet, those low mechanical vibrations traveled through the floor and walls. The iron maiden’s hollow metal chamber acted like a resonating cavity, amplifying the vibrations into a soft, rhythmic hum.